Missing parts when I build my game....

Check that the Z Axis of the platforms and everything is in front of the background? Also that their are color contrasts and a light actually ai$$anonymous$$g at the side and not just from the top.

I used toonyshader so light is not an issue (is it?). Also, I didn't put a background yet, so that shouldn't be an issue either.

If you have any warnings or errors in console output, those would be helpful. Also see the log file produced by your build after the game is run for any problems.

I don't have any warnings or errors.... I checked the log and don't see anything wrong too....

Is there anything different with the object that disappear? Do you have any code that is destroying items that might be doing something wrong? Consider creating a script that monitor one or more of these objects and log to file if they become null. In that case, something surely is removing them during Awake or Start.