diff --git a/Cargo.lock b/Cargo.lock
index 598409e..27a9171 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,12 +17,6 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
-[[package]]
-name = "bumpalo"
-version = "3.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -46,15 +40,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "js-sys"
-version = "0.3.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29c15563dc2726973df627357ce0c9ddddbea194836909d655df6a75d2cf296d"
-dependencies = [
- "wasm-bindgen",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -122,7 +107,6 @@ dependencies = [
  "tracing",
  "tracing-error",
  "tracing-subscriber",
- "web-time",
 ]
 
 [[package]]
@@ -394,70 +378,6 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
-[[package]]
-name = "wasm-bindgen"
-version = "0.2.92"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
-dependencies = [
- "cfg-if",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.92"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
-dependencies = [
- "bumpalo",
- "log",
- "once_cell",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.92"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.92"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.92"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
-
-[[package]]
-name = "web-time"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index 93f89c7..0fa1a90 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,4 +14,3 @@ spin_sleep = "1.1.1"
 tracing = { version = "0.1.37", features = ["max_level_debug", "release_max_level_debug"]}
 tracing-error = "0.2.0"
 tracing-subscriber = {version = "0.3.17", features = ["env-filter"]}
-web-time = "1.1.0"
diff --git a/assets/map.png b/assets/map.png
deleted file mode 100644
index 731f68a..0000000
Binary files a/assets/map.png and /dev/null differ
diff --git a/src/main.rs b/src/main.rs
index f945cfa..1d14b4b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,14 +1,11 @@
-use std::cell::RefCell;
 use std::process;
-use std::rc::Rc;
+use std::time::Duration;
 
-use rand::seq::IteratorRandom;
 use sdl2::event::Event;
 use sdl2::image::LoadTexture;
 use sdl2::keyboard::Keycode;
 use sdl2::pixels::Color;
 use sdl2::rect::{Point, Rect};
-use web_time::{Duration, Instant};
 
 static BLACK: Color = Color::RGB(0, 0, 0);
 
@@ -60,6 +57,8 @@ fn main() {
     let texture_creator = canvas.texture_creator();
     let mut point = Point::new(0, 0);
 
+    let mut prev = now();
+
     // let ctx = Rc::new(RefCell::new(ctx));
     // let canvas = Rc::new(RefCell::new(canvas));
     // let texture_creator = Rc::new(texture_creator);
@@ -70,9 +69,11 @@ fn main() {
 
     let target_fps = 60;
     let frame_time = Duration::from_secs_f32(1.0) / target_fps;
-    println!("Frame time: {:?}", frame_time);
     let mut frame = 0;
 
+    let mut n = 0;
+    let mut avg_fps = 0f64;
+
     loop {
         let start = now();
         let mut moved = false;
@@ -93,11 +94,6 @@ fn main() {
                         if frame > 7 {
                             frame = 0;
                         }
-
-                        // random number between 2 and 6
-                        let sleep_time = (15..=500).choose(&mut rand::thread_rng()).unwrap();
-                        println!("Sleeping for {} ms", sleep_time);
-                        sleep(sleep_time);
                     }
                     Keycode::Left => {
                         point.x -= 32;
@@ -158,15 +154,18 @@ fn main() {
         if elapsed < frame_time {
             let sleep_time = frame_time - elapsed;
             sleep(sleep_time.as_millis() as u32);
-            // println!("elapsed: {:?} sleep: {:?}ms ({:?})", elapsed, sleep_time, t2);
         } else {
             let excess = elapsed - frame_time;
             println!("! excess: {:?} ({:?})", excess, t2);
         }
 
-        let t3 = now();
-        let duration = Duration::from_secs_f64(t3 - start);
+        let duration = Duration::from_secs_f64(now() - prev);
         let fps = 1f64 / (duration.as_secs_f64());
-        println!("FPS: {}", fps);
+        prev = now();
+        
+        n += 1;
+        let a = 1f64 / n as f64;
+        let b = 1f64 - a;
+        avg_fps = a * fps + b * avg_fps;
     }
 }