Here's my first Ludum Dare entry! It was pretty satisfying completing a game in 48 hours, though it was also a lot of work. In Windows, just run the exe to start the game. In Linux, run RUNME.sh.

The controls should be pretty obvious, but here's some info anyway:
Arrow keys - Move
Z - Select in menu or fire weapon

Dodge the white bullets in the 10-second waves. Each wave is separated by 10 seconds of break time, during which you can buy items. An item is displayed if at the end of the wave you have enough coins to purchase the item, but it doesn't go away if you buy other items (so you can go into debt, though you'll suffer from interest and you won't be offered items next round unless you get out of the red). The items are as follows:

Heart - Brings back 1 hit point.
Gun - Shoots forward. Hold Z to charge to shoot 3 at a time.
Gun+ - Shoots in 4 directions. Hold to charge to shoot in 8.
Hourglass - Lets you move faster.
Orb - Gives you a hit point that lasts at most as long as the wave.
Magnet - Coins are easier to collect and are attracted to you.

Clear the regular game to unlock a second set of 10 waves. Have fun!

Made with Visual Studio with C++, SFML, GraphicsGale, Paint.NET, and MilkyTracker.