But... but the internet told me Nintendo gamers only buy Nintendo made games...
Seriously though, this is bloody awesome news. Great to see what looks like a game made with love and passion succeed. See third parties, you can sell well on Switch, you just need to make a desirable product.
1 million shipped in 20 days is good but it's nothing mind blowing that will make third-parties care about switch, and yes people buy nintendo consoles for mainly nintendo games, just look at how insane nintendo games are selling.