Thanks for your feedback! I plan to add a feature that shows the rewards for beating each difficulty in a future update.
Regarding Bastion charges – each charge blocks 3 damage. For example, if you take 20 damage, the game will consume 7 charges because:
- 7 charges of 3 damage = 21 (slightly more than 20, but 6 charges would only block 18);
- Since 20 isn’t evenly divisible by 3, the system rounds up to fully absorb the damage;
- This means sometimes the last charge is used inefficiently, but it’s necessary to prevent leftover damage.
To beat difficulty levels 2 and 3, try blocking ineffective upgrades and focus on buying upgrades at lower prices.