Amabilly is a 2D action-adventure platformer developed by lightUP. Players control Amabilly, a girl who uses her guitar to fight monsters in a strange world after falling ill. The game is structured into four distinct scenarios, each containing two level types: platforming challenges and enemy-defeating segments. Players have the freedom to choose the order in which they tackle the levels within each scenario.

The game employs colorful 8-bit style graphics and features a rock 'n' roll soundtrack. Throughout Amabilly's adventure, players can collect items that grant special powers and enhance her guitar's capabilities. This debut title from lightUP emphasizes player choice in level progression and offers varied gameplay through its two distinct level designs.