Dodge the blocks. Use A and D (default) to move left/right. You can change this in Controls. Use the arrow keys and space to navigate the menu. Use the mouse to control the high scores arrows and select a mode. In the Controls panel, click the letter you would like to change (click the A to change move left, for example) and press the key you want to change it to. (A-Z supported, arrow keys, and number keys except 0)
Just moving this from my beta account to my main. Here are the changes from 1.3 ►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄ •Added high scores •Fixed a bug where you went upside down when touching the right edge. •Frames per second counter •Fixed the Move Left control not being able to be changed •A bunch of other bug fixes which I can't be bothered to list. •Press Shift+` to toggle FPS •Rewritten block engine (now uses cloning) •Removed 119 useless scripts ►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄ New in 1.3.1: •Added separate high scores for easy, normal, and hard modes. •Made hard mode slightly easier. •Changed walking so that it's less buggy. •Replaced timer variable with image. •Fixed being able to set both controls to the same key. ►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄►◄ Thanks to SFollis for the username encoder/decoder. Here's the project if you're interested: http://beta.scratch.mit.edu/projects/10079708/