Lagcube - 4 (Lagtrain geometry dash level)

I could have tried to make it by the end of August, but I'd rather not rush the level out. The playtest ID will be available to everyone once the level is close to release (I really thought I'd finish it by the end of August, sorry). However, once again, first person that manages to find all the new references and list them in the comments (including the old ones, with timestamps), they will get the playtest ID.