Bug fixes and minor adjustments

Bug Fixes:

• Fixed Enemy counter not increasing with an increment of 1 after defeating an enemy.
• Fixed the score counter to reset to zero after changing game modes.
• Fixed the restart button.
• Controls are slightly improved. ANDROID ONLY

Added Features:

• Players can now select the rotation speed of the character from the available three modes (Low, Medium, High). ANDROID ONLY
• Player can now die from getting in between the capacitors.
• The "Boss" enemy now has an animation that is played when it is hit by a bullet.