Here are my notes:
1. Punctuation would make reading the text more enjoyable (I'm dyslexic)
2. Moving left drops you down a little and moving right corrects it
3. There needs to be a barrier to prevent falling off the map endlessly (or a kill/reset screen after a set time of falling)
4. The collision is weird between the platform/blocks and the character. You can stick to the sides of the blocks and continually jump up them. I even had a "double" jump at one time due to this. You can also get stuck just walking forward due to this issue.
5. The character is still active after the death screen pops up. You can move around and still interact with stuff (spikes) from behind the death screen.
6. There were a few times (hard to recreate) that I didn't take damage from touching the spikes, but then would instantly die a few steps later to nothing, even with full/mostly full health.
Well, I hope this helps. If there is a way into the door at the end, I didn't figure out a way. Also, maybe put a quick key layout at the beginning so we don't have to press random keys to figure out that R resets or w/e. I enjoy the art and am looking forward to what this game will turn into. I will keep giving feedback as the game updates if you're fine with it.