Hi and welcome to the second Mainframe Defenders devlog =D
If you've played the demo, you may find that after a while the game becomes a bit stale. You've played all missions, tried all items and upgrades, and there is not much to discover now.
To reignite this sense of discovery, I've added a progression system to Mainframe Defenders. The system is pretty straightforward but serves its purpose well enough. The items are unlocked by spending a certain amount of "research points". After each run, you earn research points, depending on your performance. The amount earned also scales with difficulty, so more challenge gives you faster progression.

Some items that were present in the demo are unlockable in full version, but there are also a lot of new unlockable items with completely new mechanics.