Red Blaster Demo update to 1.0.1

The demo for Red Blaster has been updated to 1.0.1 with the following changes:
- rebalanced all the levels (made upgrades more expensive, lowered enemy spawn rates, tough enemies spawn later levels); should make early gameplay easier
- introduced a health restoring power-up: a wrench will have a chance to spawn when destroying an enemy if the player is not at full health
- renamed "Lives" to "Health"
- changed buttons' color scheme to a more eye-pleasing light-blue
- redesigned some of the in-game backgrounds
- added mouse sensitivity slider in the in-game options menu from the pause screen
- added numerical values representing the upgrades in the shop and for the volume sliders and mouse sensitivity
- added a gradient color palette to each menu panel as to not look too bland
- introduced an option for resetting game progress in the options menu (which I highly recommend players who completed the demo to try in order to experience the new balancing of enemies)