Interesting idea! Loved the grayscale visuals and overall theme. Great game!
The only thing I didn't like was the way bombs worked - for me it seems that the explosion effect stays for too long and the hitboxes of it were a bit confusing.
The hitboxes are a bug. The collision testing is made only for the last frame of the explosion's animation, meaning that it is always the biggest it can be. The fact that the explosions stay longer is intentional because it makes the game harder.
