Really enjoyable game. Excellent work. :)
One small criticism: The splitter seems overpowered compared to the other two weapons. Multiplying balls like it does, I can't imagine ever using it except at the lowest level. Maybe that's intended, and maybe you have plans for more ridiculous weapons, but I figured I'd give my opinion.
I look forward to the full release. :)
Thanks for the feedback! That is definitely true. One design philosophy I like (especially for shorter games) is to have imbalance that shifts around as the player progresses. So like Magic might be better at 1st layer for a while, but then upgrades shift it to 2nd (or whatever). You're right that splitter violates this, but in theory if there were more stages I would continue to make the player keep reevaluating and re-solving the puzzle.
