While the art and sound were pretty good, as well as the theme, the gameplay in my opinion felt really disoriented compared to the level design.
I dont' know if this was intentional or not, but when the character collides with ANY solid object, you can simply jump endlessly as long as the collision remains intact. This maybe would make sense for the vines, but for walls and ladders (which you can't even climb - very misleading) it just feels like it wasen't meant to be.
I personally don't mind a one-hit death and I think in this type of game, as long as the levels are not too long, is a good thing. But again - The main issue I have is the lack of synergy between the level design and the actual gameplay.
But overall, great work!