How do I earn three stars on a level?

Finish the room using only the gold bullets shown in the counter at the top of the screen. Every additional bullet you fire costs one star, so efficiency, not speed, is what's graded.

What happens if I run out of bullets before clearing the room?

The level fails and you retry from the start. There's no penalty for restarting, so it's always better to reset and re-aim than to fire a shot you're unsure about.

Do bullets ever stop bouncing?

A bullet keeps ricocheting off walls, floors and ceilings until it hits a target or leaves the play area. Some levels limit useful surfaces or add obstacles, so always mentally continue the aim line past its first bounce before releasing.

Mr Bullet Walkthrough & Level Guide

Overview

Mr Bullet is a "one perfect shot" puzzle, so a good walkthrough is less about memorizing individual level layouts and more about reading each room correctly before you fire. Because level layouts differ between the mobile version and browser ports (and are frequently reshuffled), the reliable path to three stars is a repeatable method: identify all targets, decide whether a straight shot or a wall-bounce reaches them, and look for environmental tools (barrels, blocks, blades) that let one bullet do several jobs. The stages below group levels by the skills they test rather than by exact numbers, so the strategy stays accurate regardless of which build you are playing.

How Mr Bullet levels work

Discrete, hand-designed puzzle levels grouped into chapters, plus alternate challenge modes (e.g., grenade mode) (320 levels across 20 chapters (mobile 'Spy Puzzles' version); browser ports vary).

Stage-by-stage strategy

Early levels: direct and single-bounce shots

The opening chapters teach the basics with one or two stationary enemies. Use the aim line to confirm a clean straight shot, and when a target sits around a corner, practice a single wall bounce — release with the guide line touching the wall so the ricochet carries into the enemy. Fire only when the predicted path clearly reaches a target; these levels are where you build the habit of not wasting bullets.

Mid-game: multi-bounce bank shots and line-ups

Later levels hide enemies behind cover or spread them out so no straight line hits everyone. Plan bank shots off two or more surfaces, and reposition your angle so several enemies fall on one line — a bullet that passes through one and continues into the next is the key to keeping all three stars when you're given only one or two gold bullets.

Environmental levels: barrels, blocks and blades

Many rooms include explosive barrels, movable/knock-over blocks and moving blades. Treat these as extra 'ammo': detonate a barrel next to a cluster instead of shooting each enemy, or knock a block so it topples onto a target you can't hit directly. Time your shot so moving hazards are in the right position, and use the slow-motion on impact to confirm chains are landing.

Moving targets, hostages and boss rooms

Advanced and chapter-end levels add patrolling guards, hostages you must not hit, and tougher bosses that can take more than one hit. Wait for guards to walk into your firing line, keep ricochets well clear of neutral figures (hitting one fails the level), and against bosses focus on setting up repeatable safe shots rather than risky trick banks.

Tips to beat Mr Bullet faster

Trace the ricochet before releasing — the aim line shows the first bounce, and the bullet keeps bouncing until it hits something or leaves the screen, so mentally continue the path.
Line up multiple enemies so one shot passes through them or drives a block into several at once; this is the main way to save bullets and keep your stars.
Explosive barrels clear tight clusters — aim to detonate a barrel beside a group rather than picking targets off one at a time.
Use bank shots off walls to reach enemies hiding behind cover; a bounce often reaches what a straight line cannot.
Watch for hostages and neutral figures — hitting one fails the level, so avoid careless ricochets near them.
Only spend gold bullets: every extra shot costs a star, so if a shot looks wrong, restart and re-aim instead of firing to 'see what happens'.