How did they even do this? (Not my level)

How did they even do this? (Not my level)

Course ID is 9654-0000-000E-5B61
This is a hacked level. The style of course reminds me of a Maker called “Psycrow”. I don't know how to make hacked levels myself, but if I recall correctly, Psycrow has published tutorials in the past, if you're interested.