The game is interesting, it has room for improvement! I couldn't play it too much because of the lag when moving around. It was smooth at certain points and then it would slow down at others. It could be my hardware, but it was a little uncomfortable seeing the textures move around.
For the gameplay, it was somewhat of a slow build up at the start, and then BAM! Enemies all around! It was a bit of a shock when enemies sped up towards me when hit. Once I got an upgrade that attacked everything, I could survive long enough to see different types of enemies like the parrots and lions, which was nice.
If I waited around in a single spot, enemies weren't able to move towards the character. I think they were getting stuck on the terrain in the level. Maybe the enemies' hitboxes could be disabled temporarily so they could move past those obstacles if it happens.