I've been taking a closer look at your game and have played through the game demo a number of times now. I really have to say that I'm looking forward to the complete game!
Some of the features I like best include:
- Screen flash when firing on obects
- Visible damage on background objects
- VERY smooth platform movement
- Multiple weapons
But, I think the coolest (and probably funniest) part of the game is the destructible speakers playing the cheese pop. Hilarious!