Super Mario Bros 1-1 Unfinished

I tried making SMB, though doing on a school Chromebook, This game can barely run 1-1. I've encountered many errors, but most things work correctly, including going down the 4th pipe in the beginning. Power ups are non-functional, the flag is glitched, and trying to load the next level breaks the game, especially when reloading. Anyways, I hope you enjoy!

Controls: 
Arrows to Move
Space Bar to Sprint
Up Arrow to Jump

Feel free to copy this and continue it, just please give me credit!