Visual information on fuel tank status

Hello Unity Community,

I am making my first Unity project (Rocket Taxi). It is a 2D game with sketchy graphics, where the player controls a rocket.
I wanted to implement a fuel tank feature, and visualize the fuel quantity in a way visualized on the following image:

31039-rocketfuelproblem.png

I thought of making a Fuel sprite, masking it with the rocket mask and changing its position inside the rocket according to the fuel quantity.

I couldnt find a way to mask a sprite. Any suggestions how to approach this problem?

you can do something that is much simple but “dumb” .

make 2 sprites 1 full 1 empty place the empty straight and the full in a small angle.
then just move the full on the z axis and it will feel like its an animation.

again this is very simple but it does the trick

here is an example that works.

ll-software.com/SimpleTest.unitypackage

sfc.