Squid Jump is a demake of the Squid Jump microgame from Splatoon, written for Arduboy.
The game features 25 levels, each of which contain a variety of platforms and powerups from the original version. Highscores and level checkpoint unlocks are saved to EEPROM (at addresses 500-506 incl.) so nothing should be lost when you turn off the device.
The game is intended to be played as a 'High Score Chasing' game and is categorised as Arcade in the Arduboy categories. That being said, play the game in whatever way is the most fun, as that's its true goal!!
A Button (Hold) - Charge Jump
A Button (Release) - Jump
L + R Buttons - Move
B Button - Pause
Up Button (Hold When Paused) - Quit game + save
A Button - Select menu option
If you have an Arduboy device, you can flash either the .arduboy or .hex file to your device using an uploader such as Arduboy Uploader.
Alternatively if you don't own an Arduboy device, you can emulate it on a variety of platforms, however some emulators may not save, so you may find yourself having to play from level 1 after quitting.
The emulator that I used to test the game was Ardens.