A nice little platformer! Some good stuff on display :)
Some tips to help you in future projects-
For the timer, try rounding it to only 2 or maybe three places behind the decimal, it helps to keep game looking a bit cleaner, and also makes it more readable!
And for the artwork, I'd really recommend either trying to make all the assets yourself (which is a lot of work, I know) or, if you're using asset packs, try to use art all from one pack, or at least from packs with the same visual style. The consistency will wrap up the whole game nicely!
Anyway nice work! keep going :D