It's got nice GBA feels to the graphics and the sound, but man is the gameplay unforgiving.
Those hitboxes for the spikes are are huge and when I'm walking or flying from the ground that appears to be at the same height of those spikes, I'm expected to be able to clear it and not die. The initial momentum of the flight movement is pretty fast as well, making it very difficult to get through spikes of 2 tiles gap.
I feel like making it a bit more accessible by reducing the spike's hitbox would serve this game well.
There are also some weird bugs where I wasn't able to get the melee upgrade in my first playthrough, but after resetting the game, I can obtain that upgrade. Making games be hard yo!