I do all it in Steem Debugger - so it is compatiblle with Steem (3.2) . What would be interesting is testing about will game work fine until finish - victory, last level ...
There are some games with possibly not flawless source, for instance. Like Son Shu Shi - only when some Atari guy (Official Ninja) played it little more, then it was discovered. It was not fixed, because no good copy of that game, but at least we know what and where is error. Usually, it is possible to find good source of game.
So, just play little longer games you like, and those where no C in last row in table.
Would be good to e-mail me which games you play - then I can put list on site, what is under testing currently. There will be lest of discovered problems too.