Here is the full list of all 28 Elbub achievements.
Complete the 1st level
Collide with 2 static bubbles in a single launch of a level
Collide with 1 static bubble in a single launch of a level
Complete the 2nd level
Complete the 3rd level
Complete the 4th level
Complete the 5th level
Complete the 6th level
Complete the 7th level
Complete the 8th level
Pass the 1st level in 38 seconds
Pass the 2nd level in 73 seconds
Pass the 3rd level in 52 seconds
Pass the 4th level in 91 seconds
Pass the 5th level in 74 seconds
Pass the 6th level in 128 seconds
Pass the 7th level in 55 seconds
Pass the 8th level in 67 seconds
Collide with 3 static bubbles in a single launch of a level
Collide with 4 static bubbles in a single launch of a level
Collide with 5 static bubbles in a single launch of a level
Collide with 6 static bubbles in a single launch of a level
Collide with 7 static bubbles in a single launch of a level
Collide with 8 static bubbles in a single launch of a level
Collide with 9 static bubbles in a single launch of a level
Collide with 10 static bubbles in a single launch of a level
Collide with 11 static bubbles in a single launch of a level
Collide with 12 static bubbles in a single launch of a level