Here is the full list of all 10 Hardhat Wombat achievements.
Beat the first zone.
Simultaneously trap two beetles, each in their own poo block.
Kill 70 beetles by dropping blocks onto them.
Beat the game.
Beat all Challenge levels.
Complete a Gauntlet run in under 15 minutes.
Get a Gauntlet streak of 10 by completing 10 consecutive Gauntlet runs in under 12 minutes.
Do a Daily Gauntlet run.
Do 7 Daily Gauntlet runs.
Make a square bubble.