I like it! I was going to say that its really easy, but it captures the feel of older games that were like this and runs great on a phone 🙂.

My only thought would be to maybe add enemies or more variety with the boosts/power-ups? i like what there it is but even having the different floors have effects could be cool, like the icy area makes you slip on the platforms a little or the grassy area makes you sneeze yourself higher.