I had fun in this world but wish that there were more checkpoints, like after the first jumping puzzle. I often felt like I got sent back too far after a fall.
Thanks, Momo! Means a lot to get feedback like this. Adding one checkpoint in between ones after the first shouldn't take too much time. I'll do that now, in hopes others don't give up too early.
Update: Added 2 more checkpoints, update privately published for both Android and PC. I can't publish them publicly as I am still only of 'New User' rank right now.