Sidejumper

Sidejumper is a fast-paced 2D-style platformer on Roblox where players control a customizable jumping cube through side-scrolling obstacle courses. Developed by whar productions and launched in February 2025, it has grown rapidly to over 17 million visits in under a year. Heavily inspired by Jump Only and Eye Must Jump, the game introduces a new gameplay mechanic every 10 levels to keep the challenge fresh across 180+ levels.

The controls are simple but the execution is demanding: A/D (or tapping left/right on mobile) moves your cube, and each level requires precise timing and pattern recognition to clear. Every 10th level introduces a new mechanic - gravity shifts, moving platforms, speed changes, and more - so the game constantly evolves rather than just getting harder. Completing each 10th level also awards Stars, which unlock cosmetic cubes and faces. Coins earned during gameplay fund additional cosmetics in the shop.

Three game modes offer variety: the main campaign (sequential levels 1-180+), Endless Mode (infinite procedural challenge), and Race Mode (competitive multiplayer races against other players). Skips let you bypass individual levels, while Spins on the cosmetic wheel award random cube and face designs. Cube and face cosmetics can be mixed and matched for deep visual customization. Servers hold 12 players, keeping Race Mode competitive. The game targets players who enjoy precision platformers adapted for Roblox's social format, sitting alongside Tower of Hell in the difficulty-platformer niche but with a 2D side-scrolling twist.