Hold A, D and W when jumping to build speed. It's a pretty crucial mechanic and if you where not already used to doing so from old school shooters then this might be lost on you.

When using the machine gun rapid pressing shoot instead of holding down the shoot button will eliminate the bullet spread almost completely.


The railgun has a tendency to shoot slightly left of where you aim so always try to lead your target on their right side.


Reloading when you have bullets left will throw away all the leftover bullets.
The counter on the ammo is your total clips and not your total bullet amount, so if you can help it don't reload early and waste all your ammo.


if you need to deal a lot of damage really quickly then spamming alternate fire and reload in rapid succession will allow you spam out powerful altfire attacks much quicker then if you spam right click alone. (Be aware this chews through ammo)


The double jump boots actually shoots bullets under you when you do your second jump and these hurt enemies for a lot of damage if you can time it correctly. (Plus infinite ammunition)


The health on kill item only heals you up to half health which is indicated by the blue bar on your health bar.

You can tell the difference between upgrade machines by the simple fact that a primary fire machine is large (as seen on the left) and the alternate fire upgrade is small (as seen on the right)



When you have an item (as displayed in the bottom middle of your HUD) press Q to cycle through them unlike normal guns which are from 1-9





These bugs on level 2 can be picked up and used as grenades



The four bars under your health represents excess food eaten at full health.
If you eat 5 foods at full health your max health increases by 10 hp.

Boxes usually doesn't contain anything.
But they have a chance to drop upgrades for your guns and health.
On rare occasions it will also spawn a drone enemy.



Shoot the scrap boxes A LOT and it will keep giving you scrap until the box is visibly empty!

The crying guy gives you an item or health at the first floor of a new run if you kill all the enemies in the room as long as he survives.

Shoot at the panel instead of interacting to not only open the door but avoid the entire door opening animation.