Go to the Main menu -> Settings -> low graphics detail (checkbox) It dials the amount of crazy visuals down and makes the game A lot easier to get into (it turns off the planets and a huge number of stars and many visual special effects)

F1 - Help
W, A, S, D - player move
LMB - shot from the selected weapon
RMB - rocket shot
Mouse Wheel - change weapon and ability
Space - Start wave
E - Shop / Inventory (Open / Close)
M - Radar (On / Off)
Q - Sheild (double click - auto (On/ Off)
Esc - Return to game menu statistic (Pasue)

My reccomendation at the beginning wave to upgrade:
(this is on the first 3 waves, the following upgrades are at your discretion and to your taste)



Regeneration HP
Energy up

Max health
Armor







If you think that you are very slow- This is a upgrade for the speed

They are tied to many of the player's actions:

• For the number of waves
  
• Killing enemies
  
• For each new killed enemy (which he hasn’t seen before)
  
• For the distance you flew
  
• For the amount of money
  
• For the purchase of a new weapon
  
• For upgrade of the ship (and upgrade it to the maximum)
  
• For restored health
  
• For the combo
  
• For the use of specials abilities
  
• For damage received for a wave damage during a wave
  
• For damage to enemies
  
• when starting the game

etc....

it's hard for you to play and you stopped and can't go to the next wave in the game
here are 2 solutions:
1.Restart current wave
Press ESC -> Restart wave

Go to the Main menu -> Settings -> Delete current save (click and confirm)
(at the bottom under the screen resolution settings)