I'm working on making a Contra-like game and to teach myself I am working on replicating Contra Level 1 Jungle.
I am unable to get the side-scrolling smooth. There is a stutter about once a second in the motion when walking. It's especially noticeable once you walk to the right enough to get past the water area (Controls are WASD, Space, Enter). Also the screen appears to get a bit brighter and dimmer when motion stops / starts. Possibly it's the same issue. And in debug FPS is about 40 for me (Chrome).
I have a tilemap for the background and one for platform tiles (same source pic but with jump-thru behavior). Also there is a player sprite with a few animations, a couple bullet objects, and a couple invisible rectangles for detecting when in the water. Not many objects. Is the tilemap too big?
Below is the link to the folder with the capx file in my public Google drive. If this isn't accessible please let me know and I'll use Megaupload or open a Dropbox account.I thank you in advance for any help. I can't proceed unless I can be sure performance will not be an issue...