UI Elements
The UI will consist of:
- Crosshair
- Player health/shield
- Abilities + their cooldowns/charges
- Timer
- Level

When the player presses tab, a window shows the following information:
- Upgrade tiers
- Gem counts
- Monsters blown away
Shop UI
- After the player finishes a level, the shop menu will open up
- The player can click on a particular upgrade bar to see it description and cost
- To the left, the player can see their gem amounts. When hovering an upgrade, the gem differences will show to the right of their amount.
- If the player has enough for an upgrade, the Buy button will be highlighted green. If the player doesn’t, it will be highlighted red.