Walkthrough Guide on Give Up
Levels 1 - 5: Learn controls, maybe turn down quality to avoid input errors if your computer isn't beastly.
Levels 6 - 9: Make long double jumps across the levels in 2 double jumps.
Level 10: Things start to pick up here. Double jump to land on the safe platform, then double jump between the spikes to avoid a chunk of the level. Straightforward from there.
Levels 11 - 13: Once both double jumps are performed, the right side of the higher part of the L-on-it's-back is a safe zone. Chill there to recuperate. Level 13 requires less dawdling.
Level 14 - 15: These are annoying because the fall sometimes prevents you from getting your jump. Fall to safety, perform level as usual. Starting from 15, jump up high to fall fast down to the exit, it's safer.
Level 16 - 17: Safe Zone isn't safe anymore.
Level 18 - 20: Keep calm and ride the falling platforms at the end, you'll be fine. You might need to jump once near the start, but after that just chill out and trust.
Level 21 - 24: Easy peasy. Lasers pretty much just mean you can't backtrack. Move confidently, but don't go ahead of yourself, because you can't move backward.
Level 25: This one is tricky because the lasers at the halfway point require you to be very precise. Do a very light double jump to get to the falling platforms, don't mess up the end, and you're fine.
Level 26: Notice the scaling platforms... you'll be climbing these for a few levels, so remember them well. Very short double jumps will get you up the first two, regular jumps will get you up the last two.
Level 27 - 29: Just fall and run right, climb platforms, done. Pace yourself so that you can get by the saw. You'll be using that rhythm a lot. 28-29 are the same, just more intimidating.
Level 30: The keys here are to use a very short midair jump over the fast moving diagonal blade, and to wait on the last platform before the door, so you don't commit suicide at the end.
Level 31: Use the high path - the two single blocks that are very high, and the last platform before the door.
Level 32: Can't use the high path for this one. Standard low path tactics. Except: Scoot a little slowly off the starting platforms, and then push hard right into the invisible wall, you can make it by just as the horizontal blade there moves to the left of you. Then standard low path.
Level 33: From this point on take the high path. This is probably the hardest level in the game. Time your jumps carefully so that the bullets miss you, stopping on all three high path platforms, and pray you can dodge bullets and make it to the exit from the last one.
Level 34-37: High path and laugh. The last platform is protected so that you can take a nap there. Jump timings are different based on gun locations, and avoid spikes by moving fast (hold right!).
Level 38-39: Wonky spike dodging here. There is an invisible platform just below the horizontal saw below the last platform. When the saw starts heading left, hop down, go beneath the dropping spikes, and hop up to finish. Level 39 is the same, except the spikes, go up.
Level 40: Same as the last two, but more hectic. Hold right; time jumps, run under spikes (go a little extra to the right!), and jump up to win the game.