Vim Adventure is great! I find it annoying that it's 25$ for 6 months, because I definitely won't pay again just to quickly redo one level. I think a one-time payment would be more fair.

Or maybe if they keep adding level, we could pay per level, so that the levels that have already been paid would stay forever? I don't know.

Agree wholeheartedly. I did pay once but the sour taste it leaves in my mouth to redo what I’ve done makes me reluctant even to recommend it to others. I do recommend it, but with a caveat that probably scares them away.