You control a cosmonaut on a distant and dangerous planet. The entire game is one level split up into around 30 checkpoints, which are fairly close together. Each checkpoint can be treated like a separate puzzle. The game is also unique in that lava and spikes do not immediately kill you. Keep an eye on your temperature and oxygen level as lava will increase your temperature and a spike will cause the oxygen level to run down.

Treated each checkpoint as a separate level/puzzle and pieced them together.
Parallel lines achievement (9:50): go through both paths – right side and up.
Queen boss battle (12:30)
Explorer achievement (13:55): at the first red platform, go all the way to the left to the secret checkpoint.

The last checkpoint is stored in the registry: HKCU\Software\Cubic Pie\Yury
To backup your save, export out the key using regedit.

Here are some of my backups that may be helpful. Just copy the code into Notepad and save it with a .reg extension. Simply double-click the file to load the save game into your registry. Be sure to backup your current key if you don’t want to lose it.

Parallel Lines
This is the spot right before the two paths. If you beat the game going one way and didn’t get the achievement try reloading here and go the opposite way. It should unlock upon reaching the checkpoint following the path.
Boss Fight
In case you want to do it again. It's also a good spot to harvest snakes and wasps if you missed either of the grindy achievements.
Explorer
This is the spot right before the secret checkpoint if you missed it.