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I made a very simple game where you have a dragon flying on screen and collecting balloons. You can play it here, courtesy of GitHub Pages. You can view the source on GitHub, but be aware that it's CoffeeScript. (If you want to see the raw Javascript, you can see it here.) The game runs fairly quickly on my dev boxes in Chrome (tested in Linux VMs). It doesn't have much; maybe 10-15 sprites on screen at once, one text object, and some sine waves (yeah, I know, I couldn't resist). I built it using PhoneGap's cloud build service (it's quick to set up). But it runs slow on Android. Really slow. Oozingly slow, like a few frames per second. I'm not sure why. I checked it on my phone (Samsung Galaxy Discover -- circa 2012). I also checked it on BlueStacks, which should run lightning-fast on my desktop PC. It's still slow. Any suggestions? Is it because I left the drawing mode in AUTO instead of CANVAS?