I noticed that a lot of people want free ways to earn coin. Ideas: 4 wins in a row=5 coin. Long range snipe (max dmg.) on high wind=2 coin. Win a game (at least 20 rounds and 4 ppl) 4x enemy points=6 coin. Also, there should be achievements that give coin or xp (or both), but just once. Do with these suggestions what you will.
Very innovative and very well done. The music fits perfectly (although I switch between gameplay and rearrangement a lot, so the music switch gets a bit annoying). The level challenge was well balanced (no too hard, or too easy levels). One suggenstion: make more of the ones that have only a couple open areas but are tough. Those are really fun, not those super maze, 9 area levels. Other than that, nice job. Arguably the best puzzle game I've played. Rate + so dev. can see this!
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