Thanks for the comments guys.
I have updated the game in the Arcade now to v1.2.
Adjusted damage model. Previous there could be to much damage if the player "slided" on platforms. Now the damage occurs in short bursts in that case. The damage is now also clamped with a fixed max value.
Tuned power consumption. Faster reload and a bit faster drain.
Removed the arrows on the gates (that 0plus1 pointed out), instead placed some arrow markers in the scene.
Also added some extra eye candy and some other minor fixes.
Hope this will contribute to a more balanced game and a smoother experience.