Thanks for playing! I'm glad you enjoyed it! Yeah, I agree it's pretty frustrating when you have to restart from the beginning after a small mistake. What I thought people might do is maybe practice some of the levels so that they can eventually beat the game without getting hit. For example, level 4 can be pretty tough, so after grabbing the key and getting to do the door, you could restart the level and practice doing it again.
Anyway, thanks for the feedback! The game design isn't the best since it's my first jam, so I'll definitely try improving it and making the true ending more accessible!