How many maps are there?

Twelve names are listed. The wrapper also writes 13. I keep the names.

Are there hidden items?

The wrapper FAQ says all items are in the left menu and that there are no hidden objects.

Ragdoll Playground Controls, Maps and Guide

This guide is for the browser sandbox, the one on the play page. Roblox keys and the Android app's buttons are different games.

Controls

Browser controls
Action	Input
Select	Left click
Spawn	E or Q
Activate	F
Rotate	A or D
Drag	Hold left mouse button
Move	Arrow keys
Zoom	Mouse wheel
Delete	Right click, from the page body rather than the controls list

Maps

Twelve names are printed: Abyss, Blocks, Default, Humongous, Hybrid, Lava, Sea, Slanted, Small, Tiny, Tower, Void. The same page says 13 in two places. I show the names and I leave the extra number off the count.

Named maps
Map	Notes	Status
Abyss	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Blocks	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Default	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Humongous	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Hybrid	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Lava	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Sea	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Slanted	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Small	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Tiny	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Tower	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source
Void	Named in ragdollplayground.io's map list (page claims 13 maps but names 12)	1 source

Items

The names below come from build strings, one source. I do not have damage numbers, ammo counts or crafting costs, so those columns are absent rather than guessed.

Browser items named in the build
Item	Category	How it was identified	Status
Assault Rifle	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Shotgun	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Sniper Rifle	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Minigun	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Grenade Launcher	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Rocket Launcher	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Flamethrower	firearm	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Chainsaw	melee	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Axe	melee	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Bow	ranged	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Handgrenade	explosive	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Sticky Grenade	explosive	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source
Spike Grenade	explosive	Build asset strings (Assembly-CSharp MonoBehaviour names)	1 source

First ten minutes

Open the play page and click the frame. The data file is large, so wait through the first load.
Left-click a category on the left, then press E or Q to spawn.
Drag with the left button, rotate with A and D, activate with F.
Switch maps from the environment list before you fill the screen.
Right-click deletes. There is no mission list on the wrapper.

If the frame stays black

The wrapper recommends Chrome, Firefox or Edge on a desktop. A black frame after the click is often the data file still arriving. I do not have a sourced fullscreen bug with a numbered error, so I am not listing one.

Ragdoll Playground controls, maps and first minutes