v0.39

v0.39 updates:

• new skill: Chain lighting: a spark is shot from the ship to the nearest enemy, with a max jumps based on the current skill level,
• HUD adjustments,
• "pause" button -> for now just a pause, will be a popup with options later on,
• game over screen now shows "Levels climbed",
• speed increase curse has been introduced, which basically increases the game speed,
• asteroids curse is now disabled, needs some adjustments to be included again
• added camera shake effect to indicate that player got hit,
  
• fixed damage numbers to be included also for lighting,
• some minor adjustments & clean up