Version 0.1.4 currently doesnt show upgrade costs, we're working on an upgrade with a lot of quality of life improvements, but in the mean time:

Tech tree:

Upgrade	Base	+1	+2
Pizza Time	Win game when eat.
Shield Generator	Generation Speed: 20	COST: 50 Passive Generation: 5
Cargo hold	+1 Cargo Capacity
Tracking Turret	Rate of fire: 1 Projectile Speed: 0.2 Homing: true
Slow Turret	Rate of fire: 1 Freeze Duration: 1s	Cost: 40 Freeze Duration: 2s	Cost: 50 Freeze Duration: 2s Auto fire: true
Spread Turret	Rate of fire: 0.3 Bullets: 4	Cost: 10 10 Rate of fire: 0.3 Bullets: 6	Cost: 40 20 Rate of fire: 0.1 Bullets: 6 Auto fire: true
Pierce Turret	Rate of fire: 1 Piercing: 2 Charge time: 3s	Cost: 30 20 Rate of fire: 1 Piercing: 4
Turret	Rate of fire: 1
Thruster	Move +20 weight
Helm	Lose this, and the game is over

Resource names:
Energy
Fuel
Alloy