The best way to level grind (after you've beaten the game, of course), is to play a capture the flag game where you focus on killing people rather than actually capturing the flag. Theoretically, this could go on for ever :D
lge, the best way is to get pink crystals from daily chests and explore to get whites from chests :D (magic pick can help with that, but dont buy the pick until you have the basic premium items)
some advice: 1. Give us 3 lives, like in the traditional version 2. Add levels with different layouts 3. Add more power ups (not found in traditional version...idk like a ghost locator, speed boost, etc.) 4. Have a bar telling you when ur power pill runs out :D
tip for passage: after u reach 15 or so, start weaving up and down (like, a lot) so that ur tail is really compressed and then when the entirety of ur tail is compressed, then go straight and get the next pill...repeat until u reach 42 :D worked for me!!!