sorry . all the games on this website are crashing
Most of these games are actively under development expecting those to run like a newly released AAA title is expecting too much.
What versions are you choosing to download?
If you are choosing compressed, compacted and or shrunk versions depending on the game there could be missing assets or they're purposely repacked wrong.
Some use case scenarios require updating core assets that drive the game engine themselves, like renply, unity etc, before run time at least once before playing.
That is not the only problems you could be facing.
If you are downloading to, uncompressing from or to a bad disk area. These can cause various errors and issues during run time.
There is a tag called completed in which it shows only "completed" works, but this still will not help you if you are having drive issues on your end.
I would scan the drive where you are placing these games for defects or errors, in the method that would be proper for your os.