Here is the full list of all 33 Lunarsea achievements.
Collect 100 coins over all game modes
Buy any upgrade for your boat
Beat Level 2 of the campaign mode
Beat your first temporary goal
Beat Level 1 of the campaign mode
Travel 500m over all play modes
Travel 1000m over all play modes
Travel 5000m over all play modes
Travel 10,000m over all play modes
Collect 250 coins over all game modes
Collect 750 coins over all game modes
Collect 2000 coins over all game modes
Collect 10,000 coins over all game modes
Beat Level 3 of the campaign mode
Beat Level 4 of the campaign mode
Beat Level 5 of the campaign mode
Buy any 5 upgrades for your boat
Buy any 20 upgrades for your boat
Purchase every boat upgrade
Beat 20 Temp Goals over all game modes
Beat 100 Temp Goals over all game modes
Beat 500 Temp Goals over all game modes
Beat 2000 Temp Goals over all game modes
Beat Level 6 of the campaign mode
Beat Level 7 of the campaign mode
Beat Level 8 of the campaign mode
Beat Level 9 of the campaign mode
Beat Level 10 of the campaign mode
Beat Level 11 of the campaign mode
Beat Level 12 of the campaign mode
Beat Level 13 of the campaign mode
Beat Level 14 of the campaign mode
Beat Level 15 of the campaign mode