Genseki Wakusei (幻石惑星)

Overview
Genseki Wakusei (幻石惑星, lit. Gem Planet) is a Japanese Yume Nikki Fangame created by TOM, who also developed nostAlgic.

Gameplay
You start as a girl named Pershina (ペルシナ) in a small place with a big crystal gem. You can open the menu screen to save the game only in this place. Interacting with the big crystal gem will make her touch the crystal and warp to the Nexus, while interacting with the 4 edges of the screen will lead you to 4 different worlds.

Effects
In this game the effects are called "Stones" (いし).