Loved the sound effects! Not sure if I triggered a glitch or if the player just has a lot of health, but I was sort of just sitting in-between all the squares for ages doing nothing, before eventually dying (I presume there's no timer; there was no feedback showing I was dead).

Man this gave mega "Sploder Classic Shooter" vibes from when I was a kid.

I have to say the idea of other things trying to stop you from moving as rather clever for the limitation. Though I would really suggest not killing the player for staying still until they move for the first time. Dying a few times and not knowing why kinda sucked.

This game is actually pretty fun! I would advise adding a health bar to the game though because it appears that the enemies do not instantly kill the player. I like the concept of shooting in the direction you are moving that's very creative!