Booster Tracks!
Chad64 - Custom level - Feb 18, 2016 from Android
Revision #4, updated Jan 1, 1970
I don't know who really found out about this first but thanks @Johnsinna!
.. and now i realize that at least one object added to principia will add millions of creative ideas.
.. and i know, it gets stuck sometimes. Don't worry
Downloads: 245 - Level ID: 20901