This is a cool concept, and after a few rounds I got the feel for where the sun should be at specific times. I would have liked some sort of end state, such as trying to get as many rounds done as possible under a time limit. The visuals were cool, and that water shader was really nice!

I need more reward for being the sun :D. Maybe add a counter, or animation or any kind of purpose. I like the idea though. Visuals are also nice, especially the water. Well done!

The gameplay is great and unique. I agree with the comment of @bph_usr, timer would make the game much more challenging. Also, you can consider adding music for the background.  Besides that, good job!

A tad too simple, there's no much to do and can get repetitive. Maybe with a timer so the player has to be quick, and a clear goal (like doing 10 rounds for example) would improve this game.

I liked the water effect, looked really nice and the game fits the theme quite nicely :)

very cool!! would be good practice tbh for people who cant read clocks without numbers :)