This is way too addictive.
I posted the link in a homeschooling forum, and it went down for a few hours because the admins were too addicted to care about fixing it.
I try to limit my time, so the best I got was:
with bounce...321.9
without bounce 206.3
(i landed on 200.0 once too)
I got 563 total on part 2, and 93.8 as my best.