I don't want to be mean since I did enjoy the game and I feel like you put effort into its charm, but if I'm being honest I have to award almost no points for originality. There have been a ton of suika games on Newgrounds lately and most of them have at least one thing that sets them apart. Your game might be the most generic of all. The only thing different about it is that there are fewer levels than usual, so I can get that happy feeling of making it to the end, but that's more like a missing thing than an extra thing. Also I guess there are multiple ways to handle getting to the end. I think Cthulhu Merge just prevents the top level animals from merging. Another approach would be to form higher levels automatically by doing something like making the balls a little bigger and changing the color a bit. Your approach is to allow two top-level pinatas to merge into one top-level pinata, effectively destroying one of them, so I guess that's something unexpected at least.
Also, I lost because an explosive merge sent a few smaller pinatas flying :P
Reply: Yeah Fit Cats has a mechanic that allows you to destroy cats, and Cthulhu Merge lets you devolve animals, so that kind of thing definitely can work. With pinatas you have a lot of possibilities. Pinatas are supposed to drop candy, right? Maybe you could get to break a pinata when you collect enough candy, though that would be kind of backwards. Maybe you could get a bat that you drop the same way you drop pinatas, so you could only break pinatas at the top. Maybe pinatas could have hit points requiring them to get hit multiple times. You could even get rid of the suika mechanic and just make a game about trying to bash pinatas against other pinatas hard enough to break them before they fill up to the top