Steam game won't launch, says 'running' for short while then stops

Solved!

After many attempts, this prolbem has finally been resolved. This is how I did it.

In the end, all i needed to do was to completely uninstall Geometry Dash (or, I presume, what every game this problem is occuring with). First I uninstalled the game through the steam client. Then, I installed void tools everything. this is basically a very good and fast index searcher. By searching for 'geometry dash' I was able to delete all the files that were left on my pc after the game was supposedly uninstalled by steam. These files caused the problem. After this, I used the change/uninstall a program menu to uninstall steam, then reinstalled steam and downloaded the game and it worked.