Based on AKC's GXU Machine Ghosts, these are made to be beaten and use weaker machines. The point of these are to be used by newer players as benchmarks

Time Difficulty - these colors are to signify how hard a time is to beat

Green - Easy (these are easy to beat compared to the rest and would usually mean you rank around 50th)

Yellow - Intermediate (these are slightly harder but also really easy to beat, and would rank you around 30th)

Red - Hard (these are gonna require a lot of precision but beating them usually means a Top 20)

Purple - Expert (these are the hardest ones, usually would rank you in the Top 15-Top 10, if you beat em...you're pretty good)

Track	Time to Beat	Machine	Track	Time to Beat	Machine
Tradition Park	1'22"65		Tradition Park 2	1'25"88
Junction	1'07"93		Junction 2	1'16"58
Clip Oval	2'01"85		Clip Oval 2	2'11"58
Volute	1'28"64		Volute 2	1'56"49
Blast Track	1'17"41		Blast Track 2	1'31"48
Box Rink	1'17"80		Box Rink 2	1'26"49
Caterpillar	52"48		Caterpillar 2	47"04
Expansion Park	1'52"51		Expansion Park 2	1'57"25
Slip Highway	1'40"83		Slip Highway 2	1'42"45
Front & Back	1'36"76		Front & Back 2	2'08"64
Forked Road	42"15		Forked Road 2	54"22
Honeycomb Rink	1'13"87		Honeycomb Rink 2	1'34"28
Flower	1'17"48		Flower 2	1'32"11
Wreckage Circuit	1'38"25		Wreckage Circuit 2	1'35"48
Peak Jump	1'39"21		Peak Jump 2	1'36"85
Abyss Drop	1'49"83		Abyss Drop 2	2'02"58
Mute City	1'03"18		Big Blue	1'34"07
Silence	1'24"64		Port Town 2	1'06"63
Red Canyon	1'05"95		Sand Ocean	2'01"12
White Land 2	1'56"14		Fire Field	2'06"13
Championship	1'45"77

 Note: all these are easily beatable with the Twin Noritta and Golden Fox at least

Bonus: Forked Road 2 with the slower skip: https://youtu.be/BnSR8aFrDI0