The presentation here is great! I really liked the well formatted manual and the sounds the instructions make. The code editor is very polished too, having a clear error message and syntax highlighting is very nice. Really my only complaint would be that the program counter rests on the instruction it just executed, and not the one it's about to execute (I'm very used to the latter). I get the feeling I did the last puzzle in an unintended way (I copied the code twice and swapped every true with false and false with true, lol)