diff --git a/maze/src/lib.rs b/maze/src/lib.rs
index 59f6cfa..e936ab7 100644
--- a/maze/src/lib.rs
+++ b/maze/src/lib.rs
@@ -470,9 +470,42 @@ impl<'s> BufWriter<'s> {
     }
 }
 
-pub struct BinaryMap<const X: usize, const Y: usize, const SIZE: usize>;
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Direction {
+    North,
+    South,
+    East,
+    West,
+}
+
+pub struct BinaryMap<const X: usize, const Y: usize, const SIZE: usize>(pub [MazePart; SIZE]);
 
 impl<const X: usize, const Y: usize, const SIZE: usize> BinaryMap<X, Y, SIZE> {
+    pub fn new() -> Self {
+        Self([MazePart::Noop; SIZE])
+    }
+
+    pub fn at(&self, x: usize, y: usize) -> MazePart {
+        self.0[y * X + x]
+    }
+
+    pub fn can_move(&self, player: (usize, usize), dir: Direction) -> bool {
+        match dir {
+            Direction::West if player.0 == 0 => false,
+            Direction::West => self.at(player.0 - 1, player.1) != MazePart::Wall,
+            Direction::East if player.0 == X - 1 => false,
+            Direction::East => self.at(player.0 + 1, player.1) != MazePart::Wall,
+            Direction::North if player.1 == 0 => false,
+            Direction::North => self.at(player.0, player.1 - 1) != MazePart::Wall,
+            Direction::South if player.1 == Y - 1 => false,
+            Direction::South => self.at(player.0, player.1 + 1) != MazePart::Wall,
+        }
+    }
+}
+
+pub struct BinaryMapVisitor<const X: usize, const Y: usize, const SIZE: usize>;
+
+impl<const X: usize, const Y: usize, const SIZE: usize> BinaryMapVisitor<X, Y, SIZE> {
     fn format(&self, grid: &Grid<X, Y, SIZE>, buffer: &mut [MazePart]) {
         let mut bw = BufWriter::new(buffer);
 
@@ -574,3 +607,88 @@ mod print_tests {
         println!("{result}");
     }
 }
+
+#[cfg(test)]
+mod bm_tests {
+    use crate::BinaryMap;
+
+    #[test]
+    fn move_n_valid() {
+        let player = (1, 1);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::North), true);
+    }
+    #[test]
+    fn move_n_invalid() {
+        let player = (0, 0);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::North), false);
+    }
+    #[test]
+    fn move_n_invalid_wall() {
+        let player = (1, 1);
+        let mut bm = BinaryMap::<3, 3, 9>::new();
+        bm.0.fill(crate::MazePart::Wall);
+        assert_eq!(bm.can_move(player, crate::Direction::North), false);
+    }
+
+    #[test]
+    fn move_s_valid() {
+        let player = (1, 1);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::South), true);
+    }
+    #[test]
+    fn move_s_invalid() {
+        let player = (2, 2);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::South), false);
+    }
+    #[test]
+    fn move_s_invalid_wall() {
+        let player = (1, 1);
+        let mut bm = BinaryMap::<3, 3, 9>::new();
+        bm.0.fill(crate::MazePart::Wall);
+        assert_eq!(bm.can_move(player, crate::Direction::South), false);
+    }
+
+    #[test]
+    fn move_e_valid() {
+        let player = (1, 1);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::East), true);
+    }
+    #[test]
+    fn move_e_invalid() {
+        let player = (2, 2);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::East), false);
+    }
+    #[test]
+    fn move_e_invalid_wall() {
+        let player = (1, 1);
+        let mut bm = BinaryMap::<3, 3, 9>::new();
+        bm.0.fill(crate::MazePart::Wall);
+        assert_eq!(bm.can_move(player, crate::Direction::East), false);
+    }
+
+    #[test]
+    fn move_w_valid() {
+        let player = (1, 1);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::West), true);
+    }
+    #[test]
+    fn move_w_invalid() {
+        let player = (0, 0);
+        let bm = BinaryMap::<3, 3, 9>::new();
+        assert_eq!(bm.can_move(player, crate::Direction::West), false);
+    }
+    #[test]
+    fn move_w_invalid_wall() {
+        let player = (1, 1);
+        let mut bm = BinaryMap::<3, 3, 9>::new();
+        bm.0.fill(crate::MazePart::Wall);
+        assert_eq!(bm.can_move(player, crate::Direction::West), false);
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index e3ff2cd..b4c3c23 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,8 @@ use display_interface_spi::SPIInterface;
 use embedded_graphics::{
     geometry::Point,
     mono_font::MonoTextStyle,
+    pixelcolor::Rgb565,
+    primitives::{Line, PrimitiveStyle},
     text::{Text, TextStyle},
     Drawable,
 };
@@ -23,7 +25,6 @@ use esp_hal::{
 };
 use heapless::String;
 use profont::PROFONT_24_POINT;
-use shared::GenU32;
 use weact_studio_epd::{graphics::Display290BlackWhite, Color};
 use weact_studio_epd::{graphics::DisplayRotation, WeActStudio290BlackWhiteDriver};