Overall, this is a great little game and has much potential easily unlocked with a few small but significant tweaks.
Before going over said tweaks, let me just commend you on such a fun and inventive little game. The combat system is very unique and the concept can evolve into something amazing if you just adjust some things. The pixel art is adorable <3
Now, here are a few things to consider for 2.0:
1. As mentioned by RickyTheFish, transitions are pretty, but they're repetitious. Instead of replacing them, however, I believe all you need to do is speed them up so the transition is there but it doesn't demand too much attention.
2. A huge problem detrimental to gameplay at times is the camera. When enemies or coins are offscreen, you forget about them. A simple solution is to make the camera follow the current active character, that way when they move the camera doesn't stay behind and the player has to look around for the character.
3. Sliding slows down gameplay painfully. Try adjusting speed and friction so that characters go just as far, but they stop sooner. This would speed up combat a lot since everyone moves every turn.
4. The element icons could use some work. Everything else looks really nice, but those just don't fit in with the pretty pixel art around them. They use gradients also, which really clashes with all pixel art.
That's my two cents. Just look over those four things and make a few more suggestions here and there based on what other users say and you'll turn this good game into a great game. Good luck!