This game has been in deliberately slow development for at least 6 years (developed one day a week). I occasionally got to try intermediate versions and the end result is marvellous. You get a 100 little levels in groups of 4. Each group is focused on one specific mechanic or visual effect (often both and sometimes they are inseperable from one another). The first few sets teach you the basic mechanics. Once you've learned those you can start with the first level from any of the 25 groups. So you are never starved for choices, should you get stuck somewhere.

But as deceptively easy as it may look, some of the later levels can be truly challenging on both the puzzle and the platformer front. For the puzzle side the game will eventually offer to show you a solution in the form of jump and bounce points in order of execution (if you retry a level often enough). And for the platforming side, you can adjust the game speed between 50 and 100% in the settings.

If you need more rather than less challenge, there are also minimum action solutions per level that take fewer inputs than the hint you can get. If you take less inputs than the amount of dots stacked up in the bottom left corner, you will be awarded a triangle for that level.

And finally there are 37 additional secret levels to unlock (they come in 3 groups of 12 and one boss gauntlet level), which are generally much more challenging than the base 100.

With my testing experience from the majority of the levels as they were developed (including secret ones), but no knowledge of how to uncover the secrets or trying for minimum solutions before, I completed everything in around 10-15 hours.

This game has been in deliberately slow development for at least 6 years (developed one day a week). I occasionally got to try intermediate versions and the end result is marvellous. You get a 100 little levels in groups of 4. Each group is focused on one specific mechanic or visual effect (often both and sometimes they are inseperable from one another). The first few sets teach you the basic mechanics. Once you've learned those you can start with the first level from any of the 25 groups. So you are never starved for choices, should you get stuck somewhere. But as deceptively easy as it may look, some of the later levels can be truly challenging on both the puzzle and the platformer front. For the puzzle side the game will eventually offer to show you a solution in the form of jump and bounce points in order of execution (if you retry a level often enough). And for the platforming side, you can adjust the game speed between 50 and 100% in the settings. If you need more rather than less challenge, there are also minimum action solutions per level that take fewer inputs than the hint you can get. If you take less inputs than the amount of dots stacked up in the bottom left corner, you will be awarded a triangle for that level. And finally there are 37 additional secret levels to unlock [spoiler](they come in 3 groups of 12 and one boss gauntlet level)[/spoiler], which are generally much more challenging than the base 100. With my testing experience from the majority of the levels as they were developed (including secret ones), but no knowledge of how to uncover the secrets or trying for minimum solutions before, I completed everything in around 10-15 hours.