diff --git a/firmware/Cargo.lock b/firmware/Cargo.lock
index d4a8c52..4b793c9 100644
--- a/firmware/Cargo.lock
+++ b/firmware/Cargo.lock
@@ -752,6 +752,7 @@ dependencies = [
  "defmt",
  "defmt-rtt",
  "embassy-executor",
+ "embassy-futures",
  "embassy-rp",
  "embassy-sync",
  "embassy-time",
@@ -762,6 +763,7 @@ dependencies = [
  "embedded-io",
  "embedded-io-async",
  "embedded-storage",
+ "heapless",
  "mipidsi",
  "panic-probe",
 ]
diff --git a/firmware/Cargo.toml b/firmware/Cargo.toml
index 181e6a2..02d10e0 100644
--- a/firmware/Cargo.toml
+++ b/firmware/Cargo.toml
@@ -35,10 +35,19 @@ embassy-time = { version = "0.5", features = [
     "defmt-timestamp-uptime",
 ] }
 cortex-m = { version = "0.7.7" }
-embassy-rp = { version = "0.8", features = ["defmt", "unstable-pac", "time-driver", "critical-section-impl", "rp2040", "boot2-w25q080"] }
+embassy-rp = { version = "0.8", features = [
+    "defmt",
+    "unstable-pac",
+    "time-driver",
+    "critical-section-impl",
+    "rp2040",
+    "boot2-w25q080",
+] }
 embedded-graphics = "0.8"
 mipidsi = "0.9.0"
 embedded-hal-bus = "0.3.0"
+embassy-futures = "0.1.2"
+heapless = "0.8.0"
 
 [profile.release]
 debug = 2
diff --git a/firmware/src/main.rs b/firmware/src/main.rs
index 6eb6cf8..0cabe29 100644
--- a/firmware/src/main.rs
+++ b/firmware/src/main.rs
@@ -2,10 +2,12 @@
 #![no_main]
 
 use embassy_executor::Spawner;
+use embassy_futures::select::{select_array, select4};
 use embassy_rp::gpio::{Input, Level, Output, Pull};
 use embassy_rp::pwm::{self, Pwm};
 use embassy_time::{Delay, Timer};
 use embedded_hal_bus::spi::ExclusiveDevice;
+use heapless::String;
 use mipidsi::interface::SpiInterface;
 use mipidsi::models::ST7789;
 use mipidsi::options::Orientation;
@@ -56,20 +58,16 @@ async fn main(_spawner: Spawner) -> ! {
             .expect("display init")
     };
     let _display_backlight = Output::new(p.PIN_20, Level::High);
-    display.clear(Rgb565::BLACK).unwrap();
 
     let raw_image_data = ImageRawLE::new(include_bytes!("assets/ferris.raw"), 86);
     let ferris = Image::new(&raw_image_data, Point::new(0, 0));
-    ferris.draw(&mut display).unwrap();
 
     let style = MonoTextStyle::new(&FONT_10X20, Rgb565::GREEN);
-    Text::new(
+    let hello_text = Text::new(
         "Hello embedded_graphics \n + embassy + RP2040!",
         Point::new(0, 68),
         style,
-    )
-    .draw(&mut display)
-    .unwrap();
+    );
 
     // setup RGB LED
     let mut rg_config = pwm::Config::default();
@@ -88,20 +86,52 @@ async fn main(_spawner: Spawner) -> ! {
         b_pwm.set_config(&b_config);
     };
 
-    // Setup buzzer
-    let mut buzzer_config = pwm::Config::default();
-    buzzer_config.compare_b = 0x4000;
-    buzzer_config.enable = false;
-    let _buzzer_pwm = Pwm::new_output_b(p.PWM_SLICE5, p.PIN_11, buzzer_config.clone());
-
     // Setup buttons
     let _btn_a = Input::new(p.PIN_12, Pull::Up);
     let _btn_b = Input::new(p.PIN_13, Pull::Up);
-    let _btn_x = Input::new(p.PIN_14, Pull::Up);
+    // let _btn_x = Input::new(p.PIN_14, Pull::Up);
     let _btn_y = Input::new(p.PIN_15, Pull::Up);
 
+    let mut btn_f1 = Input::new(p.PIN_11, Pull::Up);
+    let mut btn_f2 = Input::new(p.PIN_14, Pull::Up);
+    let mut btn_f3 = Input::new(p.PIN_9, Pull::Up);
+    let mut btn_f4 = Input::new(p.PIN_3, Pull::Up);
+
+    let mut render = |f_keys: [bool; 4]| {
+        display.clear(Rgb565::BLACK).ok();
+        ferris.draw(&mut display).ok();
+        hello_text.draw(&mut display).ok();
+
+        let mut f_key_string: String<16> = String::new();
+        for (f, s) in f_keys.into_iter().zip(["1", "2", "3", "4"]) {
+            f_key_string.push_str(f.then_some(s).unwrap_or(" ")).ok();
+        }
+
+        Text::new(&f_key_string, Point::new(0, 108), style)
+            .draw(&mut display)
+            .ok();
+    };
+
+    let mut last_state = None;
+
     loop {
-        Timer::after_millis(100).await;
-        set_led(0, 0, 63);
+        let state = [
+            btn_f1.is_low(),
+            btn_f2.is_low(),
+            btn_f3.is_low(),
+            btn_f4.is_low(),
+        ];
+        if Some(state) != last_state {
+            render(state);
+            last_state = Some(state);
+            continue;
+        }
+        select_array([
+            btn_f1.wait_for_any_edge(),
+            btn_f2.wait_for_any_edge(),
+            btn_f3.wait_for_any_edge(),
+            btn_f4.wait_for_any_edge(),
+        ])
+        .await;
     }
 }