I think we all can agree that the hideous infection at level 54 has to be stopped! The lowest you can let the infection go is shown with green coloured line in the strategy picture for the first part of level 54. Otherwise you will have troubles to manage the level. If you have purchased the Charm of Scrolling you might have some small chances though, but really… scrolling down don’t make you remember what bubbles you got higher up, aiming in the unknown is much harder, no matter what charms you might have.
The middle part of level 54 can cause some troubles too. Try to remember the small details in the left wall and use them to adjust your aiming. You shoot once and adjust your aiming according to how it hits the bubbles at the right side. After playing the level a few times you are more likely to succeed, as your brain and mouse hand register the aiming spots even if you don’t think about it.
For a 3 Star walk through, why don’t you watch this video
I also found another great video walk through for level 54, thank you Sebastian for sharing your games with us. You rock! <3