nice, but could use some improvement
the numbers on the dark blue bubbles are a bit hard to read, en the major problem is the combos. you only have combos of numbers that follow eachother like 2-3-4-5. that is the only combo you can get here. my suggestion is to add a combo like 5-4-3-2 as well, which makes it also possible to get a combo of 2-3-2-1. that would make it also a lot easier (i had to try target 26 around 30 times) and maybe some combo which makes use of the color of the bubbles. maybe coz it could make it too easy. however, then you can divide it into 4 difficulty grades:
(Very) Easy: combo 2-3-4-5, combo 5-4-3-2, color combo
Easy/Medium: combo 2-3-4-5, combo 5-4-3-2, color combo, you may choose 2.
Hard: combo 2-3-4-5, combo 5-4-3-2, color combo, you may only choose 1
INSAAAAANE: no combos
that would make the game alot better and might get you an "awesome" rating. at least you will have me voting 4 or 5 instead of 3.