feat: add kickback to blunderbass. (#876)

Author: zicklag

packs/devpack/items/blunderbass/BlunderbassMeta.schema.yaml

@@ -23,4 +23,6 @@ kind: !Struct
       schema: f32
     - name: bullet
       schema: UntypedHandle # Handle<BulletMeta>
+    - name: kickback
+      schema: f32
 

packs/devpack/items/blunderbass/blunderbass.yaml

@@ -8,3 +8,5 @@ cooldown: 0.75
 bullet_count: 4
 bullet_spread: 0.8
 bullet: ./bullet.yaml
+kickback: 10
+

packs/devpack/items/blunderbass/plugin.lua

@@ -81,6 +81,13 @@ local function update()
             local player_ent = used.owner
             local player_sprite = components:get(player_ent, AtlasSprite)
             local player_transform = components:get(player_ent, Transform)
+            local player_body = components:get(player_ent, KinematicBody)
+            
+            if player_sprite.flip_x then
+                player_body.velocity.x = player_body.velocity.x + blunderbass_meta.kickback
+            else
+                player_body.velocity.x = player_body.velocity.x - blunderbass_meta.kickback
+            end
 
             -- Spawn bullets
             for i = 1, blunderbass_meta.bullet_count do