interesting and minimalist, but this game is great as example of physics. So i think it's worth to check out your code, because i don't want to use something like box2d for simple physics a la mario super bros.
https://github.com/Astroloico/JetJumper
Here it is :)
There is also an explanation of the games structure in the README.md file beccause my code is pretty messy ;)