Just finished playing through, I had a blast!
The design of the levels, especially the early ones, were fantastic. The way they introduced mechanics in a safe environment and slowly escalated the danger really made me feel like I was getting the hang of it.
The lines that are left behind on failed attempts made failing a level almost as enjoyable as completing it. Instead of each life being a hard reset you are building up this web of bouncy failures which I found really fun.
The gravity was also tuned nicely. Having it be slightly floaty ensures that you feel a real sense of tension as the lil guy flies through the air closely avoiding spikes.
I did notice that when sliding down a wall the character would stick to it instead of falling. That might be part of the buggy tiles that the splash-screen mentioned. I didn't find that this impacted game play at all so it is nothing in need of an urgent fix.
As a final note, the main character is adorable. I know we aren't allowed to judge based on graphics but fantastic work on conveying his emotions!
Thanks for making this :D