@voxik: Perhaps you should try to look for informations in the "How do I
" forum instead of posting irrelevant question in this thread. Also good job on the multi-post. Try to refrain from that in the future, either edit your posts or make sure you have put all the informations you wanted/needed before hitting the "Submit" button.
This current topic is to state the max width size of games to upload to the Scirra's arcade is 800 pixels. That's it.