Your Obby Size

Your Obby Size - Play Online

Ever wished you could shrink down to squeeze through a keyhole or grow huge to climb a giant's furniture? Your Obby Size is a parkour platformer where you control your character's size to navigate obstacle courses packed with lava pits, monsters, and brain-bending jumps. Your mission: collect trophies, unlock secret paths, and prove you're a parkour master by reaching the finish line without falling into the molten death below.

Key Features

• Size-Shifting Mechanic: Shrink or grow on command to access different routes and solve spatial puzzles.
• Trophy Hunt: Collect enough trophies scattered across levels to unlock secret areas and new locations.
• Monster Guards: Certain zones have hostile creatures you'll need to dodge or outrun.
• Unlockable Skins: Earn unique character cosmetics as you progress through the challenges.

How to Play Your Obby Size

The basics are simple—jump, run, and don't touch the lava. Mastering the size changes while timing your jumps? That's where it gets tricky.

Mastering Movement and Size Control

You move with WASD and jump with the spacebar. The twist is the Q and E keys—these shrink or grow your character instantly. You'll need to switch sizes mid-jump to slip through narrow gaps or reach higher platforms. On mobile, the on-screen interface handles everything with virtual buttons. Use the mouse wheel to zoom the camera in and out, and hold right-click to rotate your view when the cursor is visible (Shift toggles it).

Avoiding Hazards and Monsters

Lava pools are everywhere, glowing white laser barriers will reset your progress, and monsters patrol specific sections. The difficulty ramps from easy tutorial jumps to extreme precision platforming where one wrong size change sends you back to the last checkpoint. The trickiest part is judging distances when you're tiny—everything looks farther away.

Collecting Trophies and Finding Shortcuts

Gold coins with star icons float along the main path and hidden corners. Gather enough trophies to unlock branching paths that skip entire sections or lead to bonus areas with rare skins. Some shortcuts require you to be a specific size to even notice them—look for suspiciously large gaps or miniature doorways.

Who is Your Obby Size for?

This is aimed squarely at younger players who grew up on Roblox obbies and hyper-casual mobile platformers. If you're between 6 and 14 and you like colorful, bouncy challenges that don't take themselves seriously, you'll feel right at home. Adults looking for a hardcore precision platformer might find the visuals too basic and the physics a bit floaty, but if you just want a silly time-waster, it works.

The Gameplay Vibe

It's bright, loud, and chaotic in that classic Roblox-clone way. The textures tile pretty obviously—purple cave walls repeat the same pattern over and over, and the bloom effect is cranked so high everything glows like a neon sign. The soundtrack (if you can call it that) is generic upbeat loops that'll fade into background noise after five minutes. The pace is stop-and-go: you'll sprint through easy sections, then get stuck on one cruel jump for three minutes straight. It's not relaxing, but it's not edge-of-your-seat stressful either—more like a puzzle you solve by trial and error.

Technical Check: Saves & Performance

The game saves your progress automatically using browser cache, so your trophy count and unlocked skins stick around as long as you don't wipe your browser data. Performance-wise, it's super lightweight—those simple textures and basic models mean it'll run on pretty much any device from the last five years, including budget phones. I didn't notice any lag, even when the camera was zoomed way out.

Quick Verdict: Pros & Cons

A solid casual platformer if you don't mind the rough-around-the-edges visuals and enjoy Roblox-style obstacle courses.

• ✅ Pro: The size-changing mechanic adds a fun twist to standard obby gameplay.
• ✅ Pro: Runs smoothly on low-end hardware and mobile devices.
• ❌ Con: The repetitive textures and overblown bloom make it look amateurish—clearly built with basic assets.

Controls

Responsive enough for precise jumps once you get used to the floaty physics. The size-change buttons (Q/E) react instantly, which is crucial for mid-air adjustments.

• Desktop: WASD to move, Spacebar to jump, Q/E to change size, Tab for pause, Shift for cursor, Mouse Wheel to zoom, Right-Click + Drag to rotate camera.
• Mobile: On-screen touch buttons for movement, jumping, and size control.

Release Date & Developer

Developed by KreizLand and released on June 5, 2025. It's clearly inspired by the endless wave of Roblox obbies, packaged for browser play.