Great setting, great pixel art, great mechanics!
I really liked the gameplay and the way you implemented it (ally and enemy placement, for example).
The main puzzle was quite interesting too (having to use the plusmates as decoys), but sadly I didn't get to clearing it. It took me to long to level up La+ and when I finally was about to face Biboo she one-shot me. I was out of rewinds... and also of time (I was using a borrowed laptop).
I think that since La+ only gets her attack upgraded and not her defense or anything else, the rewind limit may not be necessary (maybe a counter of how many times you use it for some bragging rights).
Still, I really liked it and it shows you have a pretty clever tactical mind ;D