A: No. Your unlocked mice skins and level progression are stored separately in user_progress.dat . Applying any of the fixes above will not erase your save data.
Last Updated: May 2026 Difficulty Rating: Intermediate Applies to: Crushworld-Net Platform, Mice Crush 5 Module (Build 29) Introduction: What is "Crushworld-Net Mice Crush 5 Fix.29"? If you’ve landed on this page, chances are you’ve encountered the notorious Fix.29 error while trying to run or update Crushworld-Net’s popular "Mice Crush 5" level or mod. This specific error code—often displayed as MICE_CRUSH_5_FIX_29 , Build 29 Crash Loop , or simply "Fix.29 Required"—has been frustrating players and server administrators alike since the mid-2025 patch cycle. Crushworld-Net Mice Crush 5 Fix.29
A: No. As of Build 29, the single-player mode also relies on the Fix.29 collision engine. Without it, the game will crash on level 3 (the "Cheese Wheel" maze). A: No. As of Build 29