Tunnel rush is a fantastic game for killing time. When comparing your app to others, I like how we can play both inside and outside the tunnel. It is never boring. I like how the colors vary and that there are levels and speed increases. It would be fantastic to add some textural colors to the surroundings instead of/in addition to the solid hues. Please add some background sky photographs that change every 10 levels or with the level.

There are also a variety of other entertaining games to try. You may unwind by playing fnf, a fun and hard game.