At some point you will want to improve your bunny. Now it's important to remember about equipment. Items would allow you to increase attributes.
It's not just goggles, pants or a mask. It's an energy instance magic stones (lootboxes) will drop. What matters the most, the attributes of the items can be very different, depending on item, so you will need to think a lot while trying to make a combo of items giving you the attributes you look for...
Here's the table explaining it a little.
Number of attributes
0 - 1
1 - 3
2 - 5
3 - 10
7 - 15