This is such a simple but fun concept! I love that we actually "code" the instructions in an "IDE" instead of clicking on options or something, but I might be biased because I love when games have non time sensitive typing mechanics. I found some of the puzzles really difficult (I took forever on level 8 and couldn't figure out level 10), which I think is expected from a puzzle game like this, and I appreciated the hint for level 3.
All in all, really nice game! Great work!