With @Speeding Mullet's blessing I am honored to present the fourth iteration of the KSP Caveman Challenge:
KSP Caveman Challenge 1.7.x
Facility upgrades are forbidden.
Terrible runway and launchpad.
Part count of thirty and vehicle mass limit of 18.0 tons.
No fancy patched conics, no maneuver nodes and no Deep Space Network.
Abhorrent fear of technology as primitive as can be.
Acquire 1188 Science Points to unlock twenty nodes of the technology tree.