Creating players and other items for game - questions

Hi,
I want to create a player and a bunch of different platforms and various game assets but I am not sure of what size to create them in or resolution. Is there some place to find out this information or a guide?

Thanks

Usually I try to keep my sprite dimensions within powers of 2 (16, 32, 64, 128) etc. The dimensions of your game depends on the platform you want to export to. If it's a mobile device like an iPhone or Android, you would google the screen pixel dimensions for the specific device and use those measurements. For PC, the dimensions don't really matter too much. You can set your game assets to be whatever size you want. Just be aware that really large active objects could potentially slow down your game. The default dimensions for a frame is 640 x 480. If you select your current frame in the workspace toolbar and look at the size properties, CF2.5 gives you dimension options if you click the ">" button.

Thanks Sumo!