Yay~! I did it! I found 17 collectibles (of how many?) and died 8 times.
The rapid restart at dying is great, but it is so fast that sometimes I died twice because of that xD (I move to the right, thinking I will be able to complete the jump, died and kept pressing for a moment more, so the player revives, moves, falls and dies again ;-;). Maybe a little step to keep the player in place until jump or something?
Despite that, very fun game, congrats! :D