Press the green flag to start. Press the right arrow key to move right. Use the left arrow key to move left. Use the up arrow for jumping. The jumping isn't finished yet, so that is the reason why you can jump even if your not on the ground. Sorry I haven't added w, a s, d controls . I will add those in a later part.
I got all sprites from @griffpatch_tutor 's Tile Scrolling Tutorial Assets | Parts 1 to 10 . He says he got it from Super Mario Advance 4 (SMB 3). I followed a tutorial by him to make this project. This is part 3 of the series.