The lists of today are all about the hardest levels. So one mobile player started a list of the levels they had beaten, from easiest to hardest. These are just one person's opinion.
The Nightmare - by Jax [E]
Difficulty: 1.00 Enjoyment: 70/100
Comments: Mostly consistent if you know where to go
THE LIGHTNING ROAD - by Timeless Real [E]
Difficulty:1.10 Enjoyment:70/100
Comments: The memory part at around 70% is the hardest part
demon mixed - by RealOggy [E]
Difficulty:1.11 Enjoyment:75/100
Comments: Fairly well balanced overall
Common s3nse - by lealhalzitx [E]
Difficulty: 1.70 Enjoyment: 100/100
Comments: 20% cube is the only part that's actually needs practice
STARPUNK - by FerdeFunky [E]
Difficulty: 1.75 Enjoyment: 80/100
Comments: Half of it is free, the other isn't
Lights and Thunder – by Lyod [E]
Difficulty: 1.80 Enjoyment: 83/100
Comments: Pretty much Electrodynamix but harder in the slow sections
Platinum Adventure – by Jerry Bronze V [E]
Difficulty: 1.90 Enjoyment: 50/100
Comments: The first half is extremely unfun
HaHaHa Insane Map – by RealHaHaHa [E]
Difficulty: 2.00 Enjoyment: 55/100
Comments: The UFO is easier than it seems
Speed of Light - by TheRealSalad [E]
Difficulty: 2.10 Enjoyment: 90/100
Comments: Pretty much Electrodynamix without the difficult ship
Ultra Paracosm – by iIiRulasiIi [E]
Difficulty: 2.10 Enjoyment: 95/100
Comments: Easy but learny gameplay
Xstep v2 – by iIiNeptuneiIi [E]
Difficulty: 2.25 Enjoyment: 80/100
Comments: The middle actually requires memorisation
Hold On – by DHaner [E]
Difficulty: 2.25 Enjoyment: 95/100
Comments: Everything is the same difficulty from the drop to the last 10%
Hate – by Xatz [E]
Difficulty: 2.40 Enjoyment: 60/100
Comments: The planet part is not very sightreadable
Speed Racer – by ZenthicAlpha [E]
Difficulty: 2.50 Enjoyment: 100/100
Comments: Learny but a ton of fun
What is it – by Booglee [E]
Difficulty: 2.50 Enjoyment: 45/100
Comments: The robot is awful
69 machine – by – [E]
Difficulty: 2.50 Enjoyment: 40/100
Insomnia – by Glittershroom [E]
Difficulty: 2.50 Enjoyment: 70/100
Nether Step – by – [E]
Difficulty: 2.60 Enjoyment: 75/100
Fall Apart – by Bli [E]
Difficulty: 2.80 Enjoyment: 85/100
Blue Hell – by LaZye [E]
Difficulty: 3.00 Enjoyment: 70/100
Brainfugd – by Spu7niX (puzzle) [E]
Difficulty: 3.00 Enjoyment: 100/100
The Fairydust – by Alkali [E]
Difficulty: 3.00 Enjoyment: 75/100
Sweet Melody -- by Zoroa [E]
Difficulty: 3.05 Enjoyment: 100/100
Clubstep – by RobTop [E]*
Difficulty: 3.10 Enjoyment: 60/100
Invisible clubstep – by – [E]
Difficulty: 3.10 Enjoyment: 70/100
Problematic – by Dhafin [E]
Difficulty: 3.30 Enjoyment: 50/100
Error – by iISanE [E]
Difficulty: 3.30 Enjoyment: 75/100
Comments:The ball near the end is ridiculously diffcult
HIGH -- by Maroplay [M]
Difficulty:3.35 Enjoyment:80/100
Comments: 80-100 is as difficult as 0-80
Crazy Bolt - by FunnyGame [E]
Difficulty: 3.40 Enjoyment: 40/100
Theory of Everything 2 – by RobTop [E]*
Difficulty: 3.50 Enjoyment: 80/100
IC On – by MCAASJ [E]
Difficulty: 3.60 Enjoyment: 40/100
Dark Hell – by LaZye [E]
Difficulty: 3.80 Enjoyment: 80/100
Deadlocked – by RobTop [E]*
Difficulty: 4.00 Enjoyment: 65/100
Project J – by Jax [M]
Difficulty: 4.20 Enjoyment: 80/100
Sakupen Egg – by Sivlol [M]
Difficulty: 4.30 Enjoyment: 90/100
Tower Descent – by Pocke [H]
Difficulty: 5.00 Enjoyment: 95/100
Comments: Very learny but consistent, short, took over 1k total attempts
1. THE LIGHTNING ROAD – by Timeless Real [E]
2. The Nightmare – by Jax [E]
3. demon mixed – by RealOggy [E]
4. Speed of Light – by TheRealSalad [E]
5. Speed Racer – by ZenthicAlpha [E]
6. Platinum Adventure – by Jerry Bronze V [E]
7. Lights and Thunder – by Lyod [E]
8. Blue Hell – by LaZye [E]
9. Ultra Paracosm – by iIiRulasiIi [E]
10. HaHaHa Insane Map – by RealHaHaHa [E]
11. Clubstep – by RobTop [E]*
12. Xstep v2 – by iIiNeptuneiIi [E]
13. Invisible clubstep – by – [E]
14. Hold On – by DHaner [E]
15. Brainfugd – by Spu7niX (puzzle) [E]
16. The Fairydust – by Alkali [E]
17. 69 machine – by – [E]
18. Insomnia – by Glittershroom [E]
19. Theory of Everything 2 – by RobTop [E]*
20. Problematic – by Dhafin [E]
21. Nether Step – by – [M]
22. Deadlocked – by RobTop [E]*
23. Error – by iISanE [E]
24. Dark Hell – by LaZye [M]
25. Sakupen Egg – by Sivlol [M]
26. Project J – by Jax [M]