I don't know if I was doing something wrong or if my controller wasn't working for some reason, but I could never shoot in this game. I tried to see how far I could get without shooting anything, but it's hard to go back for a second refill when the slimes keep coming. Best I could do was try to corral them to combine so I only had to deal with one at a time.
Seems like a really fun concept and I enjoyed the art and the music. But without shooting working for me, it was hard to give a fair shake.