This has become one of my favorite character mods! However I've found some bugs when playing Coop with friends.
If the player using Cream is the host of the lobby, her flying ability will cause another player to stay stuck in the first person camera when they're looking around-- we've been able to get them unstuck by grabbing them with Grab Player mod.
If the player using Cream joins someone else's lobby, she cannot at all fly over quicksand (or anything coded to insta-kill like quicksand) because she'll immediately get treated as if she's in contact with the quicksand and get sucked in then killed.
These are so oddly-specific so I get why they may have gone unnoticed. Took us a while to realize she was causing the camera glitch. A shame because these glitches may push one to only use Cream when playing solo in their own lobby, and she's really fun to play with, specially with friends. So I'm looking forward to these getting sorted out someday.