It isn't easy to tell if you've selected a square that has already has a white arrow thing on it.
I didn't play much, but I think this game should be restructured into seperate levels.
Right now you are just constantly watching the "money lost" counter go up. New symbol you haven't seen before appears? You are basically guaranteed to lose money.
Suggestion: If the game was split up into distinct levels that slowly introduced new mechanics, your progress of learning different mechanics would be visceral, you could see your progress on the overworld map or whatever.
Because right now its like "the witness" if it only had 1 giant puzzle and a counter that said how many people you killed.