Make a bullet heaven game where the bullets are yours

Bullet heaven flips the old arcade bargain. Instead of weaving through enemy fire, you become the storm: by the end of a run your own projectiles cover the screen and the horde turns to sparks. Tyrbo builds that power fantasy with you, from the first feeble shot to the final screen-clearing build, and lets you decide how fast the power arrives.

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Survivors game concept art in the 16-bit pixel look — Looks a bullet heaven game can start from. Pick one, mix two, or name your own.

Survivors game concept art in the dark pixel look — Looks a bullet heaven game can start from. Pick one, mix two, or name your own.

What makes it bullet heaven and not bullet hell

In a bullet hell, the danger is the pattern of shots aimed at you, and the skill is reading it. In a bullet heaven, the shots are mostly yours and the danger is the crowd. That changes what you design. You are not choreographing enemy patterns; you are shaping a power curve.

The opening should feel fragile, a single dagger every second. The middle should bring a few satisfying spikes. The end should feel absurd. When you describe your game to this AI bullet heaven maker, say how you want that arc to feel, and its questions pin down the rest: how many weapon slots, how often level-ups come, and whether a run ends on a timer, a boss or your last hit point.

Readable chaos: effects, damage numbers and contrast

When the screen fills, the player still has to find their hero, the pickups and the one enemy that actually threatens them. That is an art problem as much as a code one. Strong games in this style keep the player's shots soft or translucent, give real hazards a bright outline, and let damage numbers be toned down.

Tyrbo gives each game its own look and UI skin, so you can ask for a dark field with glowing projectiles, the kind of palette the neon game maker is about, or a chunky pixel horde with hard edges. If a late run turns to mush, say so: fade your bullets, add a ring under the hero, shrink the damage text. Each fix is one sentence.

Evolutions and screen-clear moments

The payoff of the genre is the evolution: two maxed pieces combine into something far stronger, and the run turns. Plan those on purpose.

Pair each weapon with one passive that unlocks its evolved form.
Give the evolved form a new behavior, not just bigger numbers: a whip that becomes a whirlwind, a bolt that splits into ten.
Keep one clear-the-screen pickup for moments of real pressure.

The AI writes every weapon and its evolved form into your project, on top of the arena recipe and the tested movement part. It can also add a test panel that grants any weapon at max level, so you see an evolution right away instead of after a full run.

A bullet heaven generator that respects cheap phones

Projectile counts climb fast in this genre, and every effect costs frames. Tyrbo measures each game on low-end Android before it ships, so a dense late game is proven rather than hoped for. When the numbers demand it, the AI can recycle projectiles, merge overlapping hits and swap swarms of tiny enemies for fewer big ones that still read as a mob.

The run lands on your phone the same day, wired for ads and purchases (a revive after death is a natural rewarded ad) and with a leaderboard for the longest survival. For hordes, maps and progression between runs, the survivors game maker covers the wider genre.

Start a bullet heaven game with one sentence

A paper airplane pilot whose folded darts multiply until the sky turns white with paper
A lone satellite in deep space whose lasers split and orbit wider with every level
A fire spirit in a frozen forest, each level adds embers until the screen burns orange
A wizard owl whose feathers become homing missiles and evolve into a storm at max level

From a sentence to your phone

1
Describe it
One sentence is enough. Say what you tap, what you dodge, what you win.
2
Answer a few questions
Each comes with our best guess picked, so most of the time you just tap Continue.
3
See the plan
A title, a pitch, every part of the game, and concept art, before anything is built.
4
Play it today
Scan the code and it runs on your phone. Change it by talking to it.

Built to ship, not just to prototype

Every game leaves the pipeline with all of this checked, not hoped for.

No soft-locks
Runs on low-end Android
Ads and purchases wired
Leaderboards live
A signed build you own

Questions people ask

What is a bullet heaven game?

A game where you control one character and your weapons fire automatically at swarms of enemies. As you level up, your attacks multiply until they fill the screen. It is the reverse of a bullet hell, where the screen fills with enemy shots you must dodge.

Is bullet heaven the same as a survivors-like?

They are the same family seen from two sides. Survivors-like names the structure: one hero, automatic attacks, waves and level-up picks. Bullet heaven names the feeling of your fire owning the screen. Most games are both; this page focuses on the power curve and the visual chaos.

Can I make a bullet heaven game without coding?

Yes. You write what your hero is, what the weapons do and how wild the late game should get. Tyrbo asks a few follow-up questions with its best guesses filled in, shows you the plan and concept art, then builds it. Tuning is done by asking.

Can I add a boss at the end of a run?

Yes. A boss that arrives when the timer runs out, mini-bosses that drop evolution chests, a final wave with a twist: describe it and the AI writes the behavior, then you can spawn the boss on demand with a test helper to tune its health and attacks.

Your game is one sentence away.