There doesn't seem to be a way to get out of singleplayer or the online lobby so I have to quit and open the game again every time I want to change.
The aiming preview is not entirely accurate, I can aim slightly higher and still hit the target even though the preview said it would miss.
Arrows from below sometimes go through the targets and miss.
I can't shoot through the invisible wall to the left unless I'm touching it.
The game feels very nice and the controls are smooth, it looks and sounds polished too. I'm not sure about the longevity and fun factor of the game since the level is always the same though, I think some randomization would work well.
I wait for a while but couldn't find an online match, opening two instances of the game works fine though. I will try it again later to play with someone else.