Interesting puzzle design; similar to games for kids that teach programmatic thinking (loops and stuff). As you mentioned, the UI elements were too similar for effects that were different. I finished all but the fish as I couldn't work out the pattern with the arrows. Still, if you could figure out a way to expand with sub-routines and such, it could be a very similar concept to Lightbot (https://lightbot.com/).

Here is my own analysis for my game. The art and music are highlights. For the first time doing pixel art, I think I did pretty good. Aesprite is awesome! The music was also a good idea, and I didn't want to repeat what I did for a previous jam. I think the main flaw is the ui. It is really unclear what to do, and some of the icons are identical, even when they do different things, which makes certain levels really difficult. The difficulty curve was also a problem. The balloon level was more difficult than the tower level, though I intended it to be easier. Also, it isn't very fun. Nice concept and art, but a little lacking in juice and replayability.