That was fun! The little characters are really cute and I enjoyed the concept ^^. The tutorial was nice, but I would have loved to have a little in-game recap somewhere, I cannot memorize so that much information ^^'. The description helped, but it doesn't really have the sprite of the character, only the name. However, the game lacks a bit of interaction: unless I missed somthing,the majority of the gameplay is just "watching things happening without being able to do much". Yeah, you combine/add a character one per turn, but that's it ^^'. I would have loved to have a bit more control, like being able to trigger myself the special attack of each character.
But, even if it was repetitive and a bit basic... It was strangely addictive! I still had fun grinding the doors, unless I got completely obliterated xD. So good job, that was enjoyable! So I think it has potential, and just needs some fine-tuning to become a banger ;).