Yes you can! During the Kickstarter you will be able to increase or decrease your pledge tier at any stage through your Kickstarter account.
Once the campaign has ended, you can increase your Kickstarter pledge tier through your BackerKit survey. Through your BackerKit survey, you will be able to switch your pledge tier by simply clicking the 'go to page' drop down on the top right side of your survey and select 'Welcome'.
From here you can select the 'switch your pledge level' that is located below the get started button.
Please contact our Support Team via support@ghostfiregaming.com if you're needing any assistance with this.