Known bug:
1. Play the game with gamepad
2. Complete the tutorial steps until the headline says "Get your reward"
3. Press B button to open menu
4. Press D-pad down to select Tech tree button
5. Press A to activate the tech tree.
Due to a bug, pressing A here also activates the Skip-button in the tutorial window below. This causes you to get the upgrade automatically and cannot complete the steps of selecting the upgrade and buying it.
I am sorry this slipped through as it is a bit confusing.
Work around:
For part of the tutorial, in step 4-5 above use your mouse to click the "Tech tree" button in the menu, and also use your mouse to click the upgrade to get and on Buy button.
Later on in the game you totally can use the Gamepad to navigate all menus including buying upgrades using d-pad and A button. (with the exception of the settings window due to it being used to configure the gamepad bindings)
I will make a post-jam update to fix this, but due to judging embargo, just making a note here what is going on.
