Very chill programming puzzle game with a nice visual theme. I like how the BASIC language is applied - the simple manual presentation gives enough information but leaves it up to the player to figure out the nuances. The challenges are fun and the music is very relaxing. 

It's fun to experiment with the code+replicator in sandbox mode.

There are a few little quirks with the interface (e.g. "Continue Editing" == "Close Replicator" after a challenge is completed), but no serious issues.