Because of this feedback I'm going to add one additional level in each world that is a lava rising challenge. Each world will get a lava rising level with that worlds traps and enemies used on that level etc. The final game should have new game+ as well for more content (gonna try and have a secret ending with this new game+ so its a reward for beating it).
I will try to get online leaderboards but I was told that is really hard for a first time dev if I fail at it il go with local best time scores.
I actually did a lot of tests with local co-op and sadly I can't get that going correctly this first time around its way too much content I'd have to work on the game for another year and I rather move onto a new game. (il save this for bokube 2 though)