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Tomb Racers

If you try to run your game on lower resolutions, that may resolve the crashing. You should also try turning down some of the other settings.

One problem with that, at least 80% of the time I open the simples tab, my game crashes, and I didn't have enough time to finish the map the day I was working on it, so it's not too good. Wanted to try and play it with other players though, whitch is the main reason I uploaded it.

For future reference, as a general rule it's better to get your stuff playtested before it lands on the workshop.

The first impression is how many people will remember your map, as most people only play it once.
If you want to make a good impression on community-members, make sure that your first submission is your best (or at least as good as you can get it without the broad, general feedback of actually submitting it)