Hello! Thank you very much for your question and interest in the plugin!
Currently, in the full version of the plugin, you have the option of "Required Switch ID," which allows you to enable that reward if X switch is active. You can create, with events, a system that activates different rewards based on the character's level.
Example:
Switches from 100-105: Switch ID 100: Character ID 1 Level Tier 1 Switch ID 101: Character ID 1 Level Tier 2 Switch ID 102: Character ID 1 Level Tier 3 Switch ID 103: Character ID 1 Level Tier 4 Switch ID 104: Character ID 1 Level Tier 5 Switch ID 105: Character ID 1 Level Tier Max Switches from 106-111: Switch ID 106: Character ID 2 Level Tier 1 Switch ID 107: Character ID 2 Level Tier 2 Switch ID 108: Character ID 2 Level Tier 3 Switch ID 109: Character ID 2 Level Tier 4 Switch ID 110: Character ID 2 Level Tier 5 Switch ID 111: Character ID 2 Level Tier MAX
And so on for each character, this allows you to "Change" Tier as the character reaches a certain level:
It may require a bit more work, but you can have better control of the characters.
Anyway, if this is not useful to you or you specifically want the level to be a new requirement just like the switches, let me know and we will add it in a future update of the plugin!
Best regards!