As others have stated, there's no animation for matching cans together, it seems like an asset that's not being used. I liked the game but it seems to be missing a lot, like perhaps a score for matching more at once, or some kind of feedback of how you're doing in the game. The UI of course needs work, especially the level transitions. When I won the game, the game just closed immediately, the congratulations screen showed for about half a second.
I really like puzzle games and this made me wanna play more columns, keep it up :)