Normal achievements
1. basic skillet!
just play and complete the tutorial

2. getting better
get to level 10

3. that's more like it!
get to level 20

SECRET ACHIEVEMENTS (find them yourself if you want to)

1. wrong way!
i don't know to specifically get this one but i got it by running into the closet bomb on level 5 sending me out of the map

2. Wasted
Go into the hole under the white platform at the end of level 6

That's all the achievements as of time writing this