I played through the 4 levels, the animation and music is nice, though sometimes the clearing animation doesn't trigger when you line up the cans. Also it would be nice to be able to line up 4 cans or more.
One problem at the moment is that there is no raise in difficulty between the levels. In fact there is no difficulty at all because you can move the cans around as much as you can, so it's impossible to lose. Those metal cans seem like they should be obstacles somehow (unmovable or indestructible) but they disappear on their own after a while.
This is a good basis for a match-3 puzzle game, what you could add next is the ability to make combos (cans could fall when there is no can underneath anymore and any new combination of 3 or more would trigger and so on on until there is no more match to trigger), and you could add losing conditions, maybe by preventing the player to "switch a can with nothing". There could be an infinite mode where the goal is just to score the most matches before no more matches are possible 🤔
You could add cans with powers too, like a can which makes all cans of a color disappear when it is matched with two cans of that color.
There are a lot of possibilities from where your game is right now, cool work!