I develop a roguelike deckbuilder (Way to Crown) with rich and complex set of mechanics, so lots of playtesting is needed. Due to complicated nature of gameplay, players keep finding non-trivial bugs even to this day, you can see some examples of past bugs in the dev log. Another area to test is game balance, which requires a little bit more of testing time, but would also be greatly appreciated.
This is a hobby project, so we do not have deadlines, NDAs or other kinds of pressure.
If you are interested, please contact me on our discord server (or directly: alsoknown1).