The level get gradually harder to solve and you can't skip them if you don't know the solution. Below I will explain to you how to pass each level in One Level 2: Stickman Jailbreak!
Work in progress, rest of the levels will be added soon...
Level 1 (It's easy): Get the key and use it to open the door.
Level 2 (Cheetah style): Same as the first level, only now the character moves faster.
Level 3 (Left and Right): Two platforms are moving in this one.
Level 4 (Sudden invisibility): Character vanishes every few seconds.
Level 5 (Wrong key): Just don't collect the key.
Level 6 (Watch where you pushing!): Buttons are randomized, so take a closer look at them.
Level 7 (So heavy key!): Just push the key to the door.
Level 8 (Look out! The lift is in service): Try not to get killed by the moving platforms :D
Level 9 (Snail style): Character moves slow in this one...
Level 10 (Jump sensibly): Each time you jump the key spawns in a different place. Just go in front of the door and jump there a few times until the key spawns there.
Level 11 (One for all): Wait for the moving platform to help you reach the key.
Level 12 (It moves!): Screen is upside-down in this one, you also have to act fast. Is a bit tricky but you will do it with a bit of practice.
Level 13 (Gather them all): Push all the 4 keys to the door.
Level 14 (Nothing difficult): In this one the level is upside-down and mirrored, but is easy to pass it.
Level 15 (Look out! Inflammable!): Don't touch the torches!
Level 16 (Not gonna get us): Act fast to get the key and open the door...
Level 17 (Drunken master): Buttons are all over the screen in this one.
Level 18 (Trap): You can trick the trap door. First jump up next to the key, than quickly press left and right buttons to avoid the trap.
Level 19 (What about your coordination?): Just follow the dotted line.
Level 20 (Combo style): Easy one, speed of the character just randomly changes.
Level 21 (While you are reading this the door is closing): Just skip the key and go through the door, it's open.
Level 22 (Long level): Same level, just a little bit stretched.
Level 23 (Windmill): You need to find the right moment to jump over the spinning platform in this one.
Level 24 (Puzzle): Collect all the key parts that are spawning.
Level 25 (Jumper): This one looks a bit tricky. You automatically jump each time you press the left / right buttons. The trick is to keep them pressed, and you will walk after you land.
Level 26 (For what do you take them?): Just go straight to the door, and ignore the key.
Level 27 (Time is running, hurry up!): You need to finish the level in 15 seconds (i did it easily in 10 seconds)
Level 28 (You know what the light signals mean, don't you?): You can move on green and yellow, and you have to stop on red light. Just have patience...
Level 29 (Time to gather boxes): You can move the boxes with your finger!
Level 30 (Yes, doctor, do like that every 3 seconds): You can't move every 3 seconds...
Level 31 (Natural platforms cycle): Have patience, and wait for the platform without spikes...
Level 32 (You need glasses): The whole level gradually shrinks, would have been harder if control buttons shrinks too :)
Level 33 (Help to take the keys): Tap the 3 keys with your finger to collect them.
Level 34 (Life period): Finish the level before life bar runs out.
Level 35 (Only one): The correct door is the one on top-right corner.
Level 36 (Short level): Level is squashed...
Level 37 (Coded lock): The code is 037, level 37 dooh...
Level 38 (Up and down): Be carefull when you jump on the moving lifts.
Level 39 (Ugh! Web!): The spider web makes the character move really slooow.
Level 40 (17-6) -(7-2)-0-2: The result is 4, so take the key labeled 4.
Level 41 (Free cheese): Work in progress...