Not my cup of tea but great job :)
Think I reached level 3 as my best and I tried a lot of times ^^"
One big issue was the spikes that was the same color as the background, kept jumping on them by mistake as they blend out so easily. I also had trouble to figure out how high of a fall you could survive, it seemed to be longer sometimes when I fell by accident and survived but I guessed that if you do a small jump the threshold still becomes to large and you take damage.
I would probably have played a bit more if it was easier.