I found this pretty fun! Really struggled on that first jump where you have to hit the platform just right and avoid the deadly plant thing, but it was engaging enough to keep going until I made it. The art was pretty good, nice use of parallax. My biggest criticism is the opening screens - they go by too fast to read, and there's also no skipping them. Both could be solved by just leaving the screen up until the player clicks /spacebars to move to the next one.
Otherwise, yeah, really enjoyed your game! Great job!