adds an asset to the load queue
adds an image to the load queue
| Parameter | Type | Description |
|---|---|---|
| key | String | unique id of the image asset |
| path | String | path of the image asset |
adds a spritesheet to the load queue
| Parameter | Type | Description |
|---|---|---|
| key | String | unique id of the spritesheet asset |
| path | String | path of the spritesheet asset |
| frameWidth | Int | width of the frames in the spritesheet |
| frameHeight | Int | height of the frames in the spritesheet |