I have participated in some recent Global Game Jam and Ludum Dare. In GGJ I tried Construct and in the Ludum Dare I used Javascript. I wanted to test some new tools and my Object Pascal tools are not sharpened enough to rapid development (I thought...).

I made the games, but I think I could make it better if I did have used Object Pascal:

GGJ Construct game: http://www.cek.com.br/ggj/drink_or_die03/

Ludum Dare javascript game: http://www.futurosistemas.net/gettheseconds/

After testing another tools, my conclusions are: Object Pascal can compete and overrun the other tools. The best games I saw in this competitions were made by skilled developers in several kinds of development platforms.

So, be not afraid to use Object Pascal in this competition. To make a good game you need a good programmer, not a level editor. If you doubt you can ask about it to Jordan Mechner or John Carmack.