v0.3 Update

Added a new skill "Upshift" +1 bullet damage as long as you equip it.

Added a new challenge mode, win 3 times in a row you face a boss fight. If you beat the boss you will see another secret ending.

Some balance and bug fixes

Because the copyright issue, I won't be using the original soundtrack in this version of game.

This is a one man project, so bug hunting and fixes will need more time to do. If you find any bugs and glitches, you can post here and let me know, Thanks for playing my game.