Entirely expanded upon existing proof-of-concept

src/render.c

@@ -0,0 +1,38 @@
+#include "render.h"
+#include "world.h"
+
+#include "raylib.h"
+
+void DrawEntities(void)
+{
+    for (int i = 0; i < MAX_ENTITIES; i++)
+    {
+        Entity *e = &entities[i];
+
+        if (!e->active)
+            continue;
+
+        Rectangle rect =
+        {
+            e->position.x - e->size * 0.5f,
+            e->position.y - e->size * 0.5f,
+            e->size,
+            e->size
+        };
+
+        DrawRectangleRec(rect, e->color);
+        DrawRectangleLinesEx(rect, 2, BLACK);
+
+        Vector2 velEnd =
+        {
+            e->position.x + e->velocity.x * 0.10f,
+            e->position.y + e->velocity.y * 0.10f
+        };
+
+        DrawLineEx(
+            e->position,
+            velEnd,
+            2,
+            DARKBLUE);
+    }
+}