Alright I've finished up the lightning bomb. I gave it a glow and a blur filter, which doesn't seem to be effecting game speed at all.

To fix the straight line stuff I added some special cases for when the ratio is above 4 and below .4 and just gave some quick not-so-well thought out code which seems to do its job just fine for this case.

I could have probably done a lot better but since I'm trying to get this all done as quick as possible I am happy with the final result.

Check it out here: http://cheezeworld.com/under-development/

Upgrade your missiles all the way up and shoot the bomb with 'F'

It's a lot cooler if you let a lot of enemies spawn first then shoot it.