[bug] 5* speed

If I run the attached game at 5* speed, my CPU fans kick up a gear and after a few seconds my sound starts blurring and there’s an obvious lag in the game itself.
It’s not that large-a-complex.

viewtopic.php?f=49&t=14576&p=78315#p78315 - does it too (it is much larger), though *5 speed wasn’t a thing when I completed that level.

Radeon 5670
Athlon Phenom x2 - 3.2Ghz quad core
Win 7, 64bit
Speed 5 is bad.sav (379 KB)

Well hopefully with the help of that big map you made for me I’ll be able to optimise things a bit more and lower the CPU usage.