Can you adjust the viewport size in Construct Arcade?

I uploaded my game in Construct Arcade and it's displaying weirdly. My game's aspect ratio is 16:9, but it's not filling in the player.

I uploaded my game in Construct Arcade and it's displaying weirdly. My game's aspect ratio is 16:9, but it's not filling in the player.

Have u tested the options in the project property tab? For example to scale the view or have you tried setting to fullscreeN?