Wow! This was super fun despite the difficulty. I love hard retro games so I can't complain with this one. I was able to get pretty far in the "hard" way before dying.
It took me a few tries to get used to the dash (especially for the spikes) because you need to push UP to dash forward so I would run into spikes before dashing.
The graphics and the sound design really suited the game.
I'm going to be playing this again for sure!
Awesome job on the GBJam submission