There is a new version of the game available which includes most of the recommendations people made here.The changes are:

Increased trial time (15 minutes), you can play even if your v1.0 trial period is over
Improved graphics
Changed the way bullet collision works, now its easier to hit smaller targets
Some sounds were edited.
Added in game and launcher volume control
Added some in game help screens
Fixed a bug where sometimes the current special mission wasn't displayed correctly
Fixed bug with displaying error "Canvas does not allow drawing..."
Fixed bug under Vista where a missing library is reported
Fixed bug where game will sometimes crash when trial time runs out
Added the option to use non transparent clouds instead of just turning of
the alpha channel effect.
Added option for disabling cloud effect.
Power of gold has been tweaked and is now easier to do.
And a few more...

Download page:
http://www.fmgame.sdrazki.eu/Downld.html

Any more suggestions or constructive critic is welcome