This was fun.
I thought the game was overall a bit slow, I did not like the small steps, cooldowns could have bit slower or later weapons (or all weapons, enemies too) more lethal, recharging energy maybe faster ...
However multiple details reveal a good level of polish, the code you could miss is double-hinted (searching and typing codes was cool, anyway), the maps on the wall are definitely cool, there are the damage on the helmet and probably more things.
Good job.