Here is the full list of all 16 Pyramid Quest achievements.
get 40 stars
get 80 stars
die 100 times
kill 100 enemies
get 100k points
get 500k points
get 800k points
collect all blue coins
collect all red coins
collect all yellow coins
collect all green gemstones
collect all blue gemstones
complete level 18
complete level 24
complete level 30
complete all 36 levels