Like the best level of 1.0, 1.1, and so on.

1.7 - I can't remember any off the top of my head so Electrodynamix it is

1.8 - Final Sector

1.9 - Death Moon or ROTD

2.0 - Falling Up

2.1 - Scream Machine

2,2 - idk, Planispheres?

1.6 - auto clubstep
1.7 - idk
1.8 - dragon force
1.9 - death moon
2.0 - melody
2.1 - triple six (or niflheim but thats partially 2.0)
2.2 - ownselfduggedgrave

I've thought about this for 2.0 before, since 2.1 is too vast and i'm not much of a 1.9 head or anything earlier. I would have to go with Nitrogen, Badland (TamaN's, not Edicts'), and Chasm

i would say that there were no good levels in 1.1 but there's a bunch of weasels that play on a 1.1gdps for fun, allegedly

Based on the updates I've played.

1.9: Cataclysm or Chaoz Airflow

2.0: Lonely Travel

2.1: Dark Odyssey

2.2: Can't decide either but Aperture and Experiment are really good

1.0-1.1: idk

1.2: The Hell Zone by Sohn0924

1.3-1.4: idk

1.5: Stereo Demoness by MaJackO

1.6: GW Russia by MaJackO

1.7: Requiem by FunnyGame

1.8: Checkmate by FunnyGame (Silent Clubstep and vortex were both published in 1.9 apparently :p)

1.9: Sonic Wave by Cyclic

2.0: Unnerfed Yatagarasu by Riot and more

2.1: Y2P by Drakoska and more

2.2: If we're limiting it to just things entirely made in 2.2, then Kowasuyo by Elerie and Cuts, otherwise Multiplicity by S3rios

2.1 - vam by flaaroni