Here is what I mean. On a small window:

[![On a small window](https://i.stack.imgur.com/UsCSE.png)](https://i.stack.imgur.com/UsCSE.png)

The spaceship aka the player's position is perfect, near the bottom. But if I go fullscreen:

[![in fullscreen](https://i.stack.imgur.com/OqDGm.png)](https://i.stack.imgur.com/OqDGm.png)

the position of the player is in the middle. How would I make it so it's always near the bottom? How would this work with other screen sizes?