Undertale: Bits and Pieces is a remake from original game made by
@BlaizeMayes1 and Team BnP (and ported by Wanderlust) that reimagines the game.
Pass by a human and monsters world.

Details from the game:
The Player must move the protagonist's SOUL represented by a red heart to avoid attacks. As the game progresses new elements are introduced in the form of Attack Types and SOUL Modes. Attacks can be in different colors some of which can heal the SOUL or be an obstacle. SOUL modes alters the SOUL's color and how it functions in a battle and is often used during a Boss battle.

During the protagonist's turn they can use one of the four options per turn: FIGHT ACT ITEM and MERCY. FIGHT damages the opponent with a quick-time event. Selecting an ACT can change the opponent's mood or reveal information on the enemy. Using an item can benefit the protagonist. If certain conditions are met MERCY can be selected to spare the enemy which ends the combat. At the end of the battle GOLD is earned. Killing an enemy rewards EXP and LV but neither are given if an enemy is successfully spared.