Level 103 have many flavors of Bubbles

Starting Bubbles: 45
Recommended Potions: 7 Extra Bubbles in the Starting Cauldron
Points needed for 1, 2, 3 Star: 75 000, 90 000, 110 000
Special bubbles:Bomb Bubble 2 Bomb Bubblesyellow-spider-bubble Spider Bubbles
Crystal Bubble Crystal BubblesInfected Bubble Infected Bubbles

Level 103 hasn’t yet any strategies or tricks added, commenting on this post makes it go higher up in priority on the todo list.

Here is a great video for level 103 uploaded to youtube by skillgaming.