Regular mode instructions: Arrow keys to move. You begin in the bottom left corner of the map so you can't move in those directions at first. Press space to attack. If you press it multiple times (3) in a quick succession you will launch a "stone breaking" combo. It allows you to destroy certain block types. World builder mode instructions: arrow keys to move space to select a block. Type the name of the block you want to use. Choose from the list that pops up left mouse button to place selected block s to save a world. Then just follow the instructions
Luffy sprite from "one piece GBA" WARNING! This is quite buggy and may possibly crash! Known bugs: Crashing when falling long distances. Fullscreen not recommended since small gaps are formed between the blocks. This is my smooth scrolling test using clones. It has a 128 x 48 block grid (6144 blocks in total) where each block is a clone. That means that the clones need to appear and reappear as soon as they enter/leave the field of view. It was tough work... The technique I'm using does unfortunately not support infinite worlds, though I could change some numbers and make it 1000000000 x 1000000000.