Push Hazard is still being built. The app is not in the App Store or Google Play yet, and this site describes the game as it will launch.
Hazards & items
Know every tile before you take the first step.
Tiles and boxes
Steel wall
Blocks everything and never breaks. Every map has a border of them.
Brick wall
Blocks everything until a C4 or grenade blast knocks it down.
Wooden box
Pushable. A blast destroys it, and pushed onto cracked ground it falls in and fills the hole.
Iron box
Pushable and indestructible. It also fills cracked ground.
Target box and landing
The yellow boxes that count. They cannot be destroyed and cannot be pushed onto cracked ground.
Teleport
Step onto an entry pad to appear on its exit pad, the one with the same colour and number, if it is free. Boxes never teleport.
Hazards
Cracked ground
Step on it and you fall. Push a wooden or iron box onto it first to make it safe.
Proximity bomb
A trap set into the floor. Stop one square from it, diagonals included, and it explodes, hitting everything up to two squares away: you, brick walls, wooden boxes and other bombs.
Spikes
Holes in the floor whose spikes shoot up as soon as you come within one square. Stepping on them is fatal. Boxes slide over unharmed.
Electric floor
Live current: stepping on it is fatal until it is disarmed.
Items
Walk over an item to pick it up. Each one is used once and only on the map where you found it.
Defuse kit
Used up automatically when you come within one square of a bomb, which then turns into floor.
C4
Place it, step away and set it off. The blast clears the tiles around it.
Grenade
Throw it in a straight line up to three tiles. It explodes where it lands.
Shock disarm
Turns off one electric floor next to you.
Iron carpet
Covers one spike tile next to you for good.