I have a very simple scene (one circle) for which I animated the location and size using 4 keyframes (finally it scales down to 0). In blender the animation plays fine, in Krom or the HTML5 nothing is displayed.
Ah! I thought it didn’t because when I first tried Armory (v 0.5), it certainly didn’t work for me… A quick test with current Git armory shows it working beautifully!
As to why this particular file isn’t working though, I looked into it and your animation is actually playing. The trouble is that you can’t see it because the only face in your object is an ngon (a face with many sides) and currently there’s a bug in Armory where ngons don’t show because armory works with triangle faces and doesn’t convert ngons into tri’s first.
You can work around this easily, just by applying a triangulate modifier to your object.
Thanks for your help. Converting to tris helps only somewhat: the object now is visible and moves, but in my animation, the object finally scales down to size zero. The complete scaling part of the animation is missing in armory.