Hey,
mega game!
I loved playing this, and thought it was really well designed. Great use of only 2 shapes, you kept it minimal, and the audio is nice.
Not sure how well it fits this game, but I can see it fitting if the game was a little more intense - Maybe add a screen shake and particle effect when the player dies/hits the enemy?
All in all, a nice game! I would've liked if the description had said that the space key was actually an attack, because it took me a bit to realise.
Well done!