itch.io

steam only, although 2.0 will remain on itch.io forever for free so consider it a demo for the full version, which is said to probably cost $5 with localisation cost differences

Also you are aware this game was made 72 days ago, with an update being made 2 days ago?

yes...  4 bosses... only 4... not a 5th at all..

You might've seen me send this earlier but I'm re-commenting to say that I've figured it out and this is a guide to officially "beat" the game. Spoilers ig lol

So to begin with, you're going to need every perk: Bellow, Drain, and Peer. Both the Peer window and Drain window are movable, and there are indicators of where they need to be moved (Drain has a slight chip on the side of it, and Peer's eye). You can open shop to move them around easily. When moved to the correct locations (You'll know it when you see it), the windows should now say Peer! & Drain! respectively. You'll also notice that Peer! looks different. 

When the previous steps are done, stand inside of Peer!'s eye and it should start glowing and the iris should spin. At this stage, use Bellow. A window should appear now, with a box. Press the box and you should have a new bullet type. Charge your new bullet to the max and release at a wall, it should break.

From here, I don't have screenshots for it. 

The secret boss is very tough, you will need more than atleast 60 health for your first time if you're averagely skilled. Furthermore, the skill's you have bought will all be completely useless like multishot, all except for Speed, Max Health, Splash damage and Wealth pretty much. Further furthermore, All of these become null when you activate the final boss except for your speed and max health.

Have fun with the ultimate form of Smiley, I'm gonna try to figure out if there's more secret bosses!

When you get 3 items in a row, the item becomes half price.

It's not as uncommon as you think when you play long enough

I did. I'll post another comment so there's a more up to to date thing

Bellow is the best first pick due to Wyrm being the guaranteed second boss, but the best perk is actually Peer in general. 

Below gives you more area, and in later stages it pushes enemies away and even damages them.

Drain drains health in an area, duh, becoming larger at later stages.

Peer does nothing at the first stage, but from stage 2+ it gives healing items, generating them faster at later stages which basically means you don't need to buy heal. Pair that with Bellow and you can survive forever

There is something you can do with all 3, just take a good look at where the eye is pointing, and where the chip on the red box is pointing. You'll figure it out pretty quickly from there I assume.

I haven't seen anyone show this cool feature yet but, there's a secret boss that when you kill, you "win" and get this skin. as for how to get to that secret boss I have no clue how I did it. But I will figure it out.