http://www.kongregate.com/games/J0xFlasher/desperate-defender

Kinda cool.

Buying stuff adds money (important to buy more-than-300 gold-items):
66 ca 04 66 ed 0d a1 61 f3 0d => 66 ca 04 66 ed 0d a0 61 f3 0d
66 ca 04 66 a3 0b a2 a1 61 a5 0b => 66 ca 04 66 a3 0b a0 a0 61 a5 0b
66 d1 04 66 ea 0b a1 a1 61 ed 0b => 66 d1 04 66 ea 0b a0 a0 61 ed 0b

I'd come with an infinite health, but with this, you won't need one.
An extremely easy hack...just remember to look everywhere. Recommended for beginners.