Infinite platformer! Arrow keys or arrow buttons to move. Arrow buttons left and right are toggle up is press. Normal arrow key do NOT have this problem.
GriffPatch's tutorial on scrolling platformers was very helpful! I added the infinite part. Warning!!! Mobile users generating the level will be very laggy. So I added a waiting screen! Computer users ignore the very part but generating is still laggy! It takes around 35 seconds to load.