You can download the demo version for free.
Sun Blast Demo is only a flavor of what the full version has
Select your preferred operating system,
then press the Download button.
Alternative downloads from Download.com:
MacOS X version
In order to enjoy the Full Version of Sun Blast and all its
features, you must purchase the game.
You will receive a Serial Number which you will use to download
and unlock the Full Version of Sun Blast for all supported