About this game
Physics Challenge is a gauntlet. Five short stages, each isolating a single physical idea, played back to back on three shared lives. Clear all five and the round starts again with tighter margins.
Isolation is the point. The gravity stage is only about acceleration; the bounce stage is only about restitution; the momentum stage is only about transferring it from a light object to a heavy one. Each stage is short enough to fail and retry quickly, which makes it the most efficient way to work out which of the site's mechanics you find hardest.
How to play
- A briefing card names the stage and its controls before each one begins.
- Stage 1 — Gravity: move the catcher and catch falling cells. Three misses ends the stage.
- Stage 2 — Bounce: drag to aim an elastic orb and clear every target.
- Stage 3 — Momentum: fire light pucks at a heavy crate to shove it into the zone.
- Stage 4 — Balance: slide a counterweight to hold a loaded beam level.
- Stage 5 — Projectile: arc shots over a wall onto the targets. Clear all five to finish the round.
Physics mechanics
Here is what the simulation is actually doing while you play.
Stage 1 — acceleration under gravity
The falling cells accelerate the whole way down, and their speed streaks show it. Later rounds increase the gravity strength, so the cells arrive faster rather than more often.
Stage 2 — restitution
The orb keeps about 88 per cent of its speed on every bounce, and the walls are near-perfectly elastic. A shot planned around two or three bounces reaches targets a direct shot cannot.
Stage 3 — momentum transfer
The crate is roughly six times the mass of a puck. One puck barely moves it; several delivered to the same point add their momentum together, which is the whole lesson of the stage.
Stage 4 — torque balance
Loads drop onto the beam at random distances from the pivot. Your counterweight has a fixed mass, so the only variable you control is its lever arm.
Stage 5 — projectile motion
A wall blocks the direct line, so the shot has to arc. The preview shows the first part of the trajectory; the landing is your judgement.
Objective
Clear all five stages to complete a round. Four rounds complete the run.
Scoring
- Each stage cleared awards 300 points plus 100 per round number.
- Individual stages score their own objectives on top — caught cells, targets hit, and so on.
- Completing a full round of five awards a further 800 points.
Scores, favourites and play history are stored in your own browser using localStorage. There is no account, no leaderboard and no server: clearing your browser data clears them, and they do not follow you to another device.
Tips
- Learn which stage costs you lives. The stage that ends your runs is the mechanic worth practising in its standalone game — each stage maps to a full game on this site.
- Stage 3 rewards repetition. Pucks add their momentum. Hitting the crate in the same place five times moves it much further than five scattered hits.
- Stage 4 wants small corrections. The counterweight is powerful. Move it in small increments and let the beam settle rather than chasing the tilt.
- Stage 2 bounces are free. There is no penalty for a long shot. Aim at a wall rather than a target and let the orb work.
- Read the briefing card. It names the controls for that stage. They change between stages, and assuming the previous stage's controls is the most common early mistake.
Difficulty
Hard. No individual stage is brutal, but five different control schemes on three shared lives is demanding, and round four tightens every margin at once. It is a good measure of overall familiarity with the catalogue.
Features
- Five self-contained stages testing one physical idea each
- A briefing card before every stage
- Three lives shared across the whole run
- Four rounds, each harder than the last
- Every stage uses the same engine as the standalone games
How accurate is this?
Physics Arcade games use simplified, tuned physics built for playability. They are not scientific simulations: forces, masses and timings are chosen because they feel good at 60 frames per second, not because they match measured values. Where a game departs from real-world behaviour in a way that matters, the game page says so.
Physics Challenge – FAQ
Do the controls change between stages?
Yes. Each stage has its own scheme, which is named on the briefing card that appears before it starts.
Do lives reset between rounds?
No. You have three lives for the whole run, across all four rounds.
Does failing a stage restart the round?
No. Failing costs a life and restarts that stage only. Your score and round progress are kept.
Which standalone games do the stages relate to?
Stage 1 relates to Gravity Drop, stage 2 to Bounce Lab, stage 3 to Zero Gravity Arena, stage 4 to Box Balance and stage 5 to Cannon Curve.
