Given the virus situation it seems like there will be even more participants than normal. Anyone who have done this before knows the website gets completely clogged when the theme is releasd and around submission hours, so here's a quick PSA: The theme will be released on twitter as well (and they have far higher server capacity!). As for submission hour traffic, try not to wait with your game page until there's 5 minutes left of the jam. There's no reason you can't make screenshots and write a quick description before the game is 100% complete.