diff --git a/src/kekengine/cpp/common/defaults.cpp b/src/kekengine/cpp/common/defaults.cpp
index 2e2bef8..a9e2e49 100644
--- a/src/kekengine/cpp/common/defaults.cpp
+++ b/src/kekengine/cpp/common/defaults.cpp
@@ -5,6 +5,8 @@
 #include "internal/ui.h"
 #include "internal/physics.h"
 
+#include <BulletCollision/CollisionDispatch/btGhostObject.h>
+
 namespace kek::Defaults {
 
 static KeyBinding
@@ -172,16 +174,23 @@ void init() {
 	kekData.player = new Player();
 	btVector3 positions[2];
 	positions[0] = btVector3(0, -KEK_PLAYER_HEIGHT / 2 + KEK_PLAYER_RADIUS, 0);
-	positions[1] = btVector3(0, -KEK_PLAYER_HEIGHT / 2 + KEK_PLAYER_RADIUS, 0);
+	positions[1] = btVector3(0, KEK_PLAYER_HEIGHT / 2 + KEK_PLAYER_RADIUS, 0);
 	float radii[2] = {KEK_PLAYER_RADIUS, KEK_PLAYER_RADIUS};
 	btCollisionShape *shape = new btMultiSphereShape(positions, radii, 2);
 	btRigidBody *body = new btRigidBody(KEK_PLAYER_MASS, nullptr, shape);
 	body->setFriction(3);
 	body->setActivationState(DISABLE_DEACTIVATION);
-	kekData.physics->world->addRigidBody(body);
+	kekData.physics->world->addRigidBody(body, KEK_PLAYER_COLLISION_GROUP, KEK_OBJECT_COLLISION_GROUP);
 
-	kekData.player->physics = new PhysicsObjectData();
+	btCollisionShape *jumpShape = new btBoxShape(btVector3(KEK_PLAYER_RADIUS, 0.1, KEK_PLAYER_RADIUS));
+	btCollisionObject *jumpCollider = new btGhostObject();
+	jumpCollider->setCollisionShape(jumpShape);
+	jumpCollider->setActivationState(DISABLE_DEACTIVATION);
+	kekData.physics->world->addCollisionObject(jumpCollider, KEK_PLAYER_COLLISION_GROUP, KEK_OBJECT_COLLISION_GROUP);
+
+	kekData.player->physics = new PlayerPhysicsObjectData();
 	kekData.player->physics->body = body;
+	kekData.player->physics->jumpCollider = jumpCollider;
 	kekData.player->moveTo(glm::vec3(0,10,0));
 }
 
diff --git a/src/kekengine/cpp/object/gameobject.cpp b/src/kekengine/cpp/object/gameobject.cpp
index 5641147..52e0a34 100644
--- a/src/kekengine/cpp/object/gameobject.cpp
+++ b/src/kekengine/cpp/object/gameobject.cpp
@@ -38,8 +38,8 @@ void GameObject::addPhysics(btCollisionShape *shape, float mass, int collisionFl
 	shape->calculateLocalInertia(mass, inertia);
 	btRigidBody *body = new btRigidBody(mass, new btDefaultMotionState(), shape, inertia);
 	body->setFriction(1);
-	kekData.physics->world->addRigidBody(body);
-	body->setCollisionFlags(collisionFlags);
+	kekData.physics->world->addRigidBody(body, KEK_OBJECT_COLLISION_GROUP, KEK_OBJECT_COLLISION_GROUP | KEK_PLAYER_COLLISION_GROUP);
+	body->setCollisionFlags(body->getCollisionFlags() | collisionFlags);
 	this->physics->body = body;
 }
 
diff --git a/src/kekengine/include/constants.h b/src/kekengine/include/constants.h
index e2d36fb..33d8100 100644
--- a/src/kekengine/include/constants.h
+++ b/src/kekengine/include/constants.h
@@ -47,3 +47,5 @@
 #define KEK_PLAYER_RADIUS 0.5f
 #define KEK_PLAYER_EYE_OFFSET (KEK_PLAYER_HEIGHT / 2 - KEK_PLAYER_RADIUS)
 #define KEK_PLAYER_MASS 50
+#define KEK_OBJECT_COLLISION_GROUP 1
+#define KEK_PLAYER_COLLISION_GROUP 2
diff --git a/src/kekengine/include/internal/physics.h b/src/kekengine/include/internal/physics.h
index eb7a4c2..6a211bf 100644
--- a/src/kekengine/include/internal/physics.h
+++ b/src/kekengine/include/internal/physics.h
@@ -12,6 +12,10 @@ struct PhysicsObjectData {
 	btRigidBody *body;
 };
 
+struct PlayerPhysicsObjectData: public PhysicsObjectData {
+	btCollisionObject *jumpCollider;
+};
+
 namespace Physics {
 
 glm::vec3 toGLM(btVector3 vec);
diff --git a/src/kekengine/include/physics.h b/src/kekengine/include/physics.h
index 0479b33..323649d 100644
--- a/src/kekengine/include/physics.h
+++ b/src/kekengine/include/physics.h
@@ -3,6 +3,7 @@
 namespace kek {
 
 struct PhysicsObjectData;
+struct PlayerPhysicsObjectData;
 
 namespace Physics {
 
diff --git a/src/kekengine/include/player.h b/src/kekengine/include/player.h
index aaed436..5e997d3 100644
--- a/src/kekengine/include/player.h
+++ b/src/kekengine/include/player.h
@@ -7,7 +7,7 @@ namespace kek {
 class Player: public RotateableObject {
 
 public:
-	PhysicsObjectData *physics;
+	PlayerPhysicsObjectData *physics;
 	bool noclip;
 
 	Player();
diff --git a/src/kekgame/cpp/kekgame.cpp b/src/kekgame/cpp/kekgame.cpp
index 9e6a258..2952c4c 100644
--- a/src/kekgame/cpp/kekgame.cpp
+++ b/src/kekgame/cpp/kekgame.cpp
@@ -6,6 +6,11 @@
 
 #include <BulletCollision/CollisionShapes/btBoxShape.h>
 #include <BulletCollision/btBulletCollisionCommon.h>
+#include <BulletCollision/btBulletCollisionCommon.h>
+#include <btBulletDynamicsCommon.h>
+
+#include "internal.h"
+#include "internal/physics.h"
 
 using namespace kek;
 
@@ -73,7 +78,6 @@ int main(int argc, char **argv) {
 	test3->moveTo(glm::vec3(2, 1, 2));
 	scene->addObject(test3);
 
-
 	for(int i = 0; i < 10; i++) {
 		GameObject *test2 = new GameObject();
 		btCollisionShape *shape = new btBoxShape(btVector3(1,1,1));