Thank you for the kind words!
I’ll take it as 20 USD is the price. First and foremost, I have never played Orcs must die so I don’t really get the vision, so my opinion will mainly be generally based off other games.
For the current game as it is, the first issue that has to be fixed is the crashes, as that is what stops your game from being played the most.
The most important thing, especially in a paid game is gameplay and content. The gameplay currently seems fine, and as you are adding more enemy types, a storyline, perk trees etc., I don’t really see that as too much of a problem.
But the content seems severely lacking. If you look at other games, for example, one of your inspirations, Ori and the Blind Forest is $19.99 (technically same price as yours) but has close to 10 hours of gameplay content. Some other examples are, Hollow Knight at $14.99 with over 20 hours of gameplay, Hades at $24.99 with over 20 hours of gameplay, Risk of Rain 2 at $24.99 with around 7-8 hours of gameplay, but very replayable.
Most of those games are hours in length, and despite Risk of Rain 2 there being the shortest game, I actually spent the most hours on that due to the replayability. If your game’s pricing point is competing with games like those, it has to have hours of gameplay minimally. The gameplay should also not be fillers, and say, expanding from 10 days of enemy waves to 100 days of enemy waves just to extend playtime, but new areas and mechanics that the players can enjoy.
If you feel the game can’t be as in-depth as those games, I feel it’s better to lower the price, or to spend way more time adding depth to the game. Game Jam games are usually best being really short, so the current game should only be a very small fraction of the full game based on your scope, think in the sense of half of Forgotten Crossroads being Hollow Knight’s prototype.