--- a/pytouhou/game/sprite.pxd
+++ b/pytouhou/game/sprite.pxd
@@ -1,9 +1,9 @@
 from pytouhou.utils.interpolator cimport Interpolator
 from pytouhou.formats.animation cimport Animation
 
-cdef class Sprite:
-    cdef public long blendfunc, frame
-    cdef public double width_override, height_override, angle
+cdef public class Sprite[object Sprite, type SpriteType]:
+    cdef public int blendfunc, frame
+    cdef public float width_override, height_override, angle
     cdef public bint removed, changed, visible, force_rotation
     cdef public bint automatic_orientation, allow_dest_offset, mirrored
     cdef public bint corner_relative_placement
@@ -15,19 +15,19 @@ cdef class Sprite:
     cdef void *_rendering_data
 
     cdef float _dest_offset[3]
-    cdef double _texcoords[4]
-    cdef double _texoffsets[2]
-    cdef double _rescale[2]
-    cdef double _scale_speed[2]
-    cdef double _rotations_3d[3]
-    cdef double _rotations_speed_3d[3]
+    cdef float _texcoords[4]
+    cdef float _texoffsets[2]
+    cdef float _rescale[2]
+    cdef float _scale_speed[2]
+    cdef float _rotations_3d[3]
+    cdef float _rotations_speed_3d[3]
     cdef unsigned char _color[4]
 
-    cpdef fade(self, unsigned long duration, alpha, formula=*)
-    cpdef scale_in(self, unsigned long duration, sx, sy, formula=*)
-    cpdef move_in(self, unsigned long duration, x, y, z, formula=*)
-    cpdef rotate_in(self, unsigned long duration, rx, ry, rz, formula=*)
-    cpdef change_color_in(self, unsigned long duration, r, g, b, formula=*)
+    cpdef fade(self, unsigned int duration, alpha, formula=*)
+    cpdef scale_in(self, unsigned int duration, sx, sy, formula=*)
+    cpdef move_in(self, unsigned int duration, x, y, z, formula=*)
+    cpdef rotate_in(self, unsigned int duration, rx, ry, rz, formula=*)
+    cpdef change_color_in(self, unsigned int duration, r, g, b, formula=*)
     cpdef update_orientation(self, double angle_base=*, bint force_rotation=*)
     cpdef Sprite copy(self)
     cpdef update(self)