The controls were solid but pressing Z for dash felt uncomfortable. My ring finger was on A so I didn't know how to "quick access" Z. Maybe Shift would've been a better choice. While you can only jump twice, I noticed that dashing is infinite and that could help on some places. It's not too broken because of the spikes everywhere.
I must admit that I didn't complete the game. Having 5hp but spikes kill you instantly feels too cruel. Combined with the fact that a full game over screen plus reload takes more than 20 seconds and no checkpoints I couldn't make it to the end. It has potential but some kinks need to be ironed out.
I'm going to bed.