it is a nice game! very impressive given that it is the first game you ever did!
i also experienced the fullscreen bug on load that might prevent some people from playing it - but i see you added a comment here now to explain that!
I like the little light effects and the art style is funny :)
It is very challenging because of the instadeath - also I am not sure if the difficulty is ramping up over time? I am not sure if I am making progress in the game or if it is just continuing (maybe some score tracking would be nice?)