Not bad for an amateur site. Not bad at all.

Some of the flash is redundant, like the shape tweening but hey if you want it why not. Flash is great.

Layout is kinda average, could be cleaner.

Not to keen on the background colour, white preferred.

Your source code (c/c++) would benefit from proper indentation and alignment. Also having key words highlighted would improve readability. That's not as hard as it sound. Most c/c++ ides have an export to html option now.

Also a few no nos, like #include math.h when it should be #include <cmath> for c++ and using system pause but that's just me being pedantic

Overall not bad.