Wow this is pretty cool, and all done in canvas
Running on a relatively crap laptop, I did have some performance issues, making the game not feel quite snappy as I would like. Also the UI needs some work, some things I tried but didn't work the way expected:
-Tapping the charges I expected it to cycle through the numbers
-placing a charge starting neutral I actually had no idea what it did at first.
-So when placing a charge maybe it would be best if some kind of prompt showed up to allow the user to decide which type of charge to use.
-The lack of loading screen is a bit worrying considering it took some time for the page to show up (is the site quite large?)
Comparing this game to something like "cut the rope" which I really enjoyed. The puzzles don't quite feel satisfying. I think the star positioning, and target need to be more forgiving in the first levels. I felt like the momentum mechanic for the moving particle induced more frustration than anything because it was more difficult to move it to exactly where I wanted it to go.