Add assessment

assessment.md

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+# Game Project Assessment
+
+Pat, 
+
+This is wonderful! The UI is really smooth (given the constraints!), 
+and the game is quite complex. I'm curious about whether you found the 
+framework intuitive and helpful for your thinking.
+
+The bug you mention in your commit message, of needing to check collisions 
+from both sides, is very common in games like this. I found a funny bug: The 
+game crashes if you manage to get shot with your own bullet. 
+
+Chris