Bubbles

Playing Bubbles from the Der Spiegel site. (Better on
Chrome for translating the instructions). Cleared level 1,
going on to level 2. It's a shooter and a puzzle at the same time...

https://spiele.spiegel.de/bubble-shooter/

Level 3, and I'm mortified1 Haven't been able to reach the minimum
points level...

Modest standings, but I am getting through:

Level 5 looks hard; working with 15 bubbles, I have down 100 and make 700 points!!

...