I tried this earlier today, and it's fairly enjoyable for an action puzzle game.
I'd like to say that the tutorials could be slightly improved. The instructions are clear, but you should make use of interactive tutorials to allow the player to follow the game's mechanics specifically and directly instead of reading through the onscreen instructions (and perhaps getting lost in the process).
Aside from that, you could also work up with the background music a little. To me, it sounds just a bit repetitive at some intervals, so consider adding some upbeats to it. I understand this is a beta release, so you might not have actually finalized the soundtrack yet.
Anyways. I really liked it, and I'll be looking towards the final release. Good luck!