LEL can now do hit detection on squares.

lel.cpp

@@ -69,6 +69,17 @@ namespace lel {
     cur = {0, 0};
   }
 
+  std::optional<std::string> Parser::hit(int x, int y) {
+    for(auto& [name, cell] : cells) {
+      if((x >= cell.x && x <= cell.x + cell.w) &&
+          (y >= cell.y && y <= cell.y + cell.h)) {
+        return name;
+      }
+    }
+
+    return std::nullopt;
+  }
+
   Cell center(int width, int height, Cell &parent) {
     Cell copy = parent;