A downloadable mod for Windows

NOTICE: Version 1.1(a) has been tested with WINE and works perfectly with it. Neither is true for V1.0, though.

The already insanely difficult Shadow Mantle fight from Deltarune has now been modded into a game called Cute Jump! Enjoy the infamous altercation, now with platformer controls!

Inspired by NiroAnimations' ERAM in Mario fangame.

Features

Even outside of the boss fight, the game now also has...

  • An actual title screen!
  • A settings menu, complete with volume control and key rebinding! (Carpal tunnel is a thing of the past!)
  • a silly bump sound effect when you hit the ceiling
  • A pause menu!
  • New easter eggs!
  • no controller support.....     i'm sorry....    gamemaker 8's controller api isn't very good......

Controls

The gameplay-related binds can be rebound in the settings menu.

  • Arrow Keys - Move/Jump
  • Enter - Accept (in menus) or continue dialogue
  • End - Die or skip cutscenes
  • F4 - Toggle fullscreen
  • Insert (or F9) - Take a screenshot

Credits

The original "Cute Jump" can be played here.

Updated 13 days ago
StatusReleased
CategoryGame mod
PlatformsWindows
Release date Jul 29, 2025
AuthorZaven
GenrePlatformer
Made withGameMaker
Tags2D, deltarune, Difficult, Fangame, GameMaker, jumping, No AI, Pixel Art, Singleplayer
Average sessionAbout a half-hour
LanguagesEnglish
InputsKeyboard
AccessibilityConfigurable controls, One button
ContentNo generative AI was used

Download

Download
Mantle Mod (Version 1.1a) 18 MB

Install instructions

Download, extract, ignore Windows Defender, bingo.

Development log

Comments

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the ingame audio settings dont work :<

Thanks for reporting!!

I think I fixed this in a cancelled V2.0 update to this game, but I'd have to grab the 1.1 source code from my old PC to backport the working volume code.

If I don't get around to doing that, you can probably just use Volume Mixer on Windows or KMix on Linux to change the volume.

(+1)

Version 1.1a has now released, which fixes this issue.