(shameless plug) I'm just posting this here for another link to my mod, obviously based on Geometry Dash :)
https://gamebanana.com/mods/372747
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This is such a wu wear comprehensive post. You covered all the bases!
New slitherio players can quickly learn the basics, while experienced players can continually refine their strategies to climb the leaderboard. The thrill of seeing your snake grow and dominate the game world is a powerful motivator, driving players to keep playing.
That's amazing when seeing a mode based on geometry dash scratch. Thanks for sharing it