This is stupid but...

[AlexoGames23]

I was making my first game and i spent 4 hours. I closed it, and now i can't open it. it's not corrupted, it's just that i dont know how to open it. I can't select the folder of the game and i have it on steam.
can someone help me?

 

[Shaz]

What do you mean you "can't select the folder of the game"? Where are you trying to select?

By default, Ace opens the last project you were working on. So you should just need to run Ace and it ought to be there.
If it's not, you should be able to click the Open Project button or choose it from the menu, then navigate to wherever your project is saved and select it from there.
Finally, you should be able to go to the project's folder in Windows Explorer and double-click on the Game.rvproj2 file (its description is RPGVXAce Project).

If none of those work, tell us where you saved your game when you first created it, and if you've done anything since then like moving it to a new location, whether it was on an external drive or USB or you put it in dropbox or something, and whether you've reinstalled Ace since you created the project.

 

[Andar]

I can't select the folder of the game and i have it on steam.

if that means you stored your project inside the steam folder, then you might have had it destroyed by a wrong cloudsync.

NEVER store your games in ANY of the program folders, not until they are complete and installed there by an installer. There are too many things that can go wrong otherwise.