BeatShips

Warning: The skin change achievement does not work on the latest version. You will need to depot to an older version to get it. However, the game deletes all achievements on a changed version (due to save incompatibility). Unlock this one first, by doing the following:

• Start the game, then quit (generates a save). Do not do anything yet.
• On a different device, depot to a version that has two buttons for changing skins. I used the oldest depot obtainable. Once overwritten, launch, beat a map, and change a skin. Exit, and never launch the game on this device again.
• On the device that has the most recent version, start the game. You should still have the chameleon achievement. You can now start playing.

As there are only 40 songs in the game, you will have to perfect all of them. Some tips:

• Destroying an enemy by ramming it does not negate a perfect score.
• Other ship types might be better suited for a particular song (The UFO can tank quite a few hits, see above for why that's useful)
• Disablers will not hit you if you only move across one side of their square. (diagonally alongside them)
• Memorise, memorise, memorise! Look at it as a rhythmic game of memory. Every song has a path to follow. How you go across that path determines whether or not you succeed.