I like your game trailer and the ability to move between rooms to play new games.
It could be helpful to add a little game story at the beginning so that players know what they're supposed to do. It was hard to understand whether I was supposed to win the games or not, and what my ultimate goal in the game was. Perhaps also having a response that shows a player has successfully proceeded in the game, even some kind of "Next Game!" or confetti pop up.
Also, this might be because I'm not used to gaming so much, but having a title screen or instruction at the beginning of each game instructing players how they should interact with the game items.