You only get one upgrade in this game. I had to cut the list slightly and i’m still not sure I can implement all of these and still get everything else done, but i’m sure going to try (swaps allow you to swap your upgrade)

• Scavenger – Find twice as many bombs
• The Swapper – Find twice as many swaps
• Windfall – Immediately gain two bombs, but you can not swap again this room
• Versatile – Two immediate swaps but you can not swap to a different skill for this room and the next
• Jack of All Trades – Four immediate swaps, but will be permanently weaker
• Second Wind – Next time you die you instead have full health, but you then can not swap in that room
• Bomb Technician – No damage from your own bombs, plus they have twice the explosive radius
• Explosives Expert – Bombs do increased damage
• Explosive Mitosis – Bombs explode in to two more bombs in random directions
• Just Trolling – Health regenerates if there are enemies present
• Vampirism – Regenerate health when enemies die
• Doctor – Slightly increased max health, and health packs restore twice as much health
• Super Tough – Big increase in max health, and health packs restore slightly more
• Light Armour – Increases damage reduction
• Heavy Armour – Half movement speed, but high damage reduction
• Energy Shield – Shield that absorbs some damage, and slowly comes back
• Magic Wall – RMB to bring up a wall that absorbs all projectiles, but can’t attack
• Cloaking Device – RMB to turn invisible, but can’t attack
• Blink – RMB to teleport to that location
• Cool Speed – Hold the RMB to slow down everything
• Stronger – Increased damage
• Deadly ill – Highly increased damage, but half the maximum health
• Unstable – The lower your health, the higher the fire rate
• Sniper – High bullet speed, range and damage, but very low rate of fire
• Speedy – Move speed increased
• Monk – Melee. Ignore armour and has high attack speed and move speed.
• Warrior – Melee. Very powerful attacks.
• Penetrator – Slightly longer range and bullets ignore walls and enemy armour.
• Frostmage – Bullets slow enemy movement
• Pyromancer – Bullets deal damage over time
• Machine Gun Girl – Very high attack rate and knockback
• Shotgun Guy – Short range but multiple bullets in a spread at once.
• Exploding Man – Explosions deal less damage to you, and you can RMB to explode
• Searing Skin – Enemies that touch you take damage
• Boss Hunter – Killing bosses give you trophies that increase your damage (max 5)
• Combo King – Killing enemies increases the meter and fire rate, but getting hit sets it to zero
• Focused – Focusing on a single enemy
• Minecraft – Dig through walls or place walls with RMB
• Charge – Holding down LMB charges to create a stronger attack
• BOS – Holding down RMB builds up an effect that converts all bullets on screen to yours