diff --git a/obstacle.go b/obstacle.go
index 287fc23..0149c11 100644
--- a/obstacle.go
+++ b/obstacle.go
@@ -7,7 +7,7 @@ import (
 )
 
 type Obstacle struct {
-	Bounds v.Rect2d `json:"bounds"`
+	Bounds v.AABB2d `json:"bounds"`
 	Hp     int      `json:"-"`
 }
 
@@ -45,7 +45,7 @@ func GenerateObstacles(count int, width, height float32) []Obstacle {
 		out = append(
 			out,
 			Obstacle{
-				Bounds: v.Rect2d{
+				Bounds: v.AABB2d{
 					A: v.Point2d{X: x, Y: y},
 					B: v.Point2d{X: 20 + x + w, Y: 20 + y + h},
 				},
diff --git a/robot.go b/robot.go
index 588ff93..d547ddd 100644
--- a/robot.go
+++ b/robot.go
@@ -169,7 +169,7 @@ func (r *Robot) checkCollisions(g *game, move_vector v.Vector2d) (bool, v.Point2
 	intersection_point := v.Point2d{X: 0, Y: 0}
 
 	// Check Walls
-	r_walls := v.Rect2d{A: v.Point2d{X: 0, Y: 0}, B: v.Point2d{X: g.width, Y: g.height}}
+	r_walls := v.AABB2d{A: v.Point2d{X: 0, Y: 0}, B: v.Point2d{X: g.width, Y: g.height}}
 	collision, _, pos := v.RectIntersection(r_walls, r.Position, move_vector)
 	if collision {
 		return collision, pos, nil