v0.1.5-alpha

Small update making things generally better and testing out new mechanics

0.1.5-alpha

• add d-pad up now uses a shield that absorbs health from enemies
• add Reworked menus, added help tab for controls.
• add Improvements to enemy scripts, including randomised enemies behaviours.
• add Minor changes to art such as player ship.
• add refinements to channel 3 in music tracks.
• Fix bug where the player would take 2 hits on contact with some enemies.
• Fix when enemies were in a vertical line they wouldn't collide with the player.