I love Proteus and although the game is focused mostly on being a roguelike, I'd like to add enough content to make it an enjoyable experience without any enemies. Most likely the story will be a bit shorter or different but it should be a similar experience. And there will be also en endless mode which would be just "walk wherever you want for as long as you want".
New environments should be coming soon. After the core gameplay mechanics are all in the game, I plan to add a few proper "levels/zones".
The tutorials will be coming as well. Short ones, focused on very specific topics. Accessible at once. And with story getting into the game, some of the basic concepts will be introduced on the way.