sonic, coud it make to 2.5D Unity WebGL https://mrunity3d.itch.io/
This looks like good towerDefense game to fit for https://itch.io/jam/25d-game-jam , also we like to help to customize like this https://mrunity3d.itch.io/survival-shooter-3fps-unity25d-webgl2 or alternative link https://connect.unity.com/mg/other/survival-shooter-3fps-unity2-5d-webgl2
can you image some scenes of this into 2.5 or the whole game, try to build into unity WebGL https://itch.io/jam/25d-game-jam if you need help than we can collaborate.unity and i can help with settings you see the example game we made to run here https://connect.unity.com/mg/other/survival-shooter-3fps-unity2-5d-webgl2
Games that could be updated to https://itch.io/jam/25d-game-jam like Unity WebGL 2 (3D and 2D into 2.5D)