Just One Boss

wait is this from scratch cause I know you can post from scratch and this exact game is on scratch

SCORE

If you no-hit the entire fight and collect all the bonus tiles at the end, you'll get a total of 41,200 points from collecting tiles. There's also a speed bonus, which gives you 100 points for each second under 6:20. Tiles can spawn right under your feet, so with perfect RNG, I think the theoretical fastest time is around 3:30.

TIPS

• The flowers only hurt you at the moment they bloom; you can safely walk on them afterwards.
• The column where the boss begins the moving laser attack is safe; he only starts shooting the laser after he's already moved one column to the side.
• To dodge the cards in phases 3 and 4, stand one column away from the middle, and not in the top two rows. When the card in the row above you is between you and your reflection, move up twice.
• If you die in phase 3 or 4 and continue, you (that is, the blue guy) will respawn on the right side of the arena, so be warned if you prefer to be on the left.
• Sometimes taking a hit will let you beat the boss slightly faster, at the expense of your score.

HARD MODE TIPS

• Like the flowers, the shockwaves from the coins aren't a lingering hitbox.
• The triple laser attack has a small chance to put you in a situation where it's humanly impossible to get to safety fast enough. I don't have an image, and it's hard to explain without one, but you'll know when it happens to you.
• Don't ask me how to dodge the wavy hat attacks. In my opinion, making an attack that doesn't adhere to the grid was a terrible idea.

Please reply if you have any tips to add!

Hi, I played your game and made a video about it. Just wanted to let you know.

This game is a masterpiece!

Just One Boss is a minimalist masterpiece. It focuses on a single, intense boss fight with clever attack patterns. The tight dodging mechanics and vibrant colors make it a fun, addictive challenge.

I wanted to play it on the go, so I tried it with the app I developed, "Gamepad Browser."

https://play.google.com/store/apps/details?id=com.namcreations.browsergameplay&referrer=utm_source%3Ditch_io%26utm_medium%3Dportal

Thanks to the virtual gamepad and full-screen mode, the controls on mobile devices are incredibly smooth.

You should definitely try this player!

It's so funny, I bonked myself against this so many times like two years ago, never made it past the point where the character splits..... and then I came back on a whim and beat it in one shot today! Really one of my fave pico-8 games.

When I come here from a bookmark the sound doesn't work???

Saturday, ‎February ‎21, ‎2026, ‏‎12:48:20 AM

played it on coolmathgames, it's super good

Cool game.

great game

I want to remix the boss theme

If only if it was downloadable. Great game, btw. :)

good game!

bro i used to have the world record for the speedrun in this game

Hm. Wow this game's old and still good

hehe silly mirror

Me tomó mucho pero por fin lo logre con un increíble tiempo de 37 minutos y poco más logré superar el modo difícil

No me voy a rendir hasta lograr pasar el modo difícil!!

Wow I still remember this from way back. It left a really strong (and good) impression!

Uh sorry sir. Sorry sir! SORRY SIRRRRRRRRR AHHHHHHHHHHHHHH

Keep it up

got a score of 17900 in 5:05 with 1 death

FINALLYY!! Wait there's a hard mode? ;n;

The audio stopped working here, but it does work on lexaloffle.com. The pico-8 engine on that site is a bit newer, but I don’t know if it has anything to do with my issue.

Really unique.

Really cool! Made it in 11:51

Damn good boss

Simple and extremly  hard in a funny way I loved playing that

Thanos Mode is hard.

I replayed this game and got a score of 11000 in 2 tries.

Dude, this is excellent! I only made it to the mirror mode but really solid game!

Great game!

One question though can you please add WASD compatibility?

I used to love to play this game on cool math games

my only thought that can sum up everything in this game was my first comment in each phase

1: oh fun hes like a mirror.

2: ohhhh hes a magician, I get it now, I understand, that's coooool.

3: WHAT NO?!?!

I used to play this on cool math games..

this is very good!

man this game was cake