Took a while to get the hang of things. To be honest, I was very close to giving up and moving on the next game, but I'm glad I stuck through it and figured things out because it was fun after that. The biggest obstacle in the game was trying to get other cars moving as I intended. Unexpected behavior in a game can sometimes be frustrating, especially if you know what to do but the execution fails. I might have done something wrong, but I had to click on the blue and green icons every time I wanted to place a "time bubble". I would prefer to click the icon once and place all the bubbles of that color in one go, maybe even mouse-scroll to cycle through blue / green. Other than that, great idea for a game. Just gotta fix a few bugs and quality of life issues.