Congratulations on your first game jam submission!
First of its a really solid submission, even if the level is the tutorial.
I loved playing The lost Vikings as a child and the clearly inspired swap mechanic was nicely done! Even thought about meaningful own abilities, that were combinable in a immersive way, great job !
And obviously you did all the art assets yourself, great job, again!
I had solid fun and would easily see myself play more of that game.
Good job - you have the talent to make games! Keep making games!