The game mechanics are cool, where you need to control 2 characters to help you reach the end of the level, at first it's a little hard to get used to the controls, but after a while you get used to the controls, I think there could be more phases, but as it is a gamejam it is understandable to be short, there was a problem in phase 3 the jump stops working out of nowhere; A tip, in the menu and in the cutscene you have to use the mouse to go to the game and skip or advance the dialogue, being that in the game it is not necessary to use a mouse, making the player have to use a mouse only for the menu and for the dialog, in this case, you could use a button to advance the dialog and enter the menu, the art and music is good, this a game has potential to play a local multiplayer like fireboy and watergirl, congratulations on the game, keep it up.
(Sorry if my English is bad, I'm Brazilian and I'm not fluent in English, so I'm using google translator)