I'm not a fan of tilemaps, but that's just my style of game creation (and you should also note that I'm a full-up amateur here - this is a bit of fun/hobby for me rather than a means of making a living). I prefer to use sprites and tiled backgrounds because they scale better than the tilemap object. However, from what I've read on the forum, the tilemap is a very efficient way of drawing lots of images (the problem for me is it produces visible seams unless you do not use pixel rounding and you do use integer scaling). If you are happy to work around those limitations then I think it's your best option - and from the sounds of your description of using lots of sprites - it might just well be. It's also worth considering that C2 optimizes its collision checking so that (not so effective on mobile) lots of objects shouldn't impact on your game's performance too much. If any of your sprites are large, however, you also run the risk of running out of memory. Hope this helps?