I tried loading this into Scratch but I'm not sure if it worked right; what I got wasn't really a playable game. I think I figured out the intended logic. Start as the blue cube, avoid the spikes because they'll turn you into the red cube. But what happened was a lot of red cubes spawning which appeared as a trail behind the blue cube, and it took me a while to figure out what was going on (at first I thought it was a rendering glitch).