diff --git a/doc/examples/GdsDemo/demo.gd b/doc/examples/GdsDemo/demo.gd
index 1246016..de15fbc 100644
--- a/doc/examples/GdsDemo/demo.gd
+++ b/doc/examples/GdsDemo/demo.gd
@@ -2,16 +2,32 @@ extends Node
 
 var myfloat := [0.0]
 var mystr := [""]
+var values := [2.0, 4.0, 0.0, 3.0, 1.0, 5.0]
+var items := ["zero", "one", "two", "three"]
+var current_item := [2]
+var anim_counter := 0
 
 func _ready():
     var io := ImGui.GetIO()
     io.ConfigFlags |= ImGui.ConfigFlags_ViewportsEnable
 
-func _process(_delta):
+func _process(_delta: float) -> void:
     ImGui.Begin("hello")
     ImGui.Text("hello from GDScript")
     ImGui.DragFloat("myfloat", myfloat)
     ImGui.Text(str(myfloat[0]))
     ImGui.InputText("mystr", mystr, 32)
     ImGui.Text(mystr[0])
+
+    ImGui.PlotHistogram("histogram", values, values.size())
+    ImGui.PlotLines("lines", values, values.size())
+    ImGui.ListBox("choices", current_item, items, items.size())
+    ImGui.Combo("combo", current_item, items)
+    ImGui.Text("choice = %s" % items[current_item[0]])
     ImGui.End()
+
+func _physics_process(_delta: float) -> void:
+    anim_counter += 1
+    if anim_counter >= 10:
+        anim_counter = 0
+        values.push_back(values.pop_front())
diff --git a/gdext/scripts/gds_bindings.py b/gdext/scripts/gds_bindings.py
index 27b1d97..98271a5 100644
--- a/gdext/scripts/gds_bindings.py
+++ b/gdext/scripts/gds_bindings.py
@@ -180,7 +180,7 @@ def __init__(self, j):
 class Param:
     def __init__(self, j):
         self.name = j["name"]
-        self.is_array = j["is_array"]
+        self.is_array = j["is_array"] or self.name == "values" # HACK: because is_array not set
         self.is_varargs = j["is_varargs"]
         if not self.is_varargs:
             self.orig_type = j["type"]["declaration"]
diff --git a/gdext/src/ImGuiAPI.h b/gdext/src/ImGuiAPI.h
index 8cfa7a3..b32ed2b 100644
--- a/gdext/src/ImGuiAPI.h
+++ b/gdext/src/ImGuiAPI.h
@@ -82,27 +82,35 @@ struct GdsArray
     operator T*() { return buf.data(); }
 };
 
+// TODO: take PackedFloat32Array parameters instead
 template <>
-struct GdsArray<const char* const>
+struct GdsArray<const float>
 {
-    Array& arr;
-    std::vector<CharString> buf;
-    std::vector<const char*> ptrs;
+    std::vector<float> buf;
 
-    GdsArray(Array& a) : arr(a), buf(a.size()), ptrs(a.size())
+    GdsArray(Array& arr) : buf(arr.size())
     {
         for (int i = 0; i < arr.size(); ++i)
         {
-            buf[i] = String(arr[i]).utf8();
-            ptrs[i] = buf[i].get_data();
+            buf[i] = arr[i];
         }
     }
 
-    ~GdsArray()
+    operator const float*() { return buf.data(); }
+};
+
+template <>
+struct GdsArray<const char* const>
+{
+    std::vector<CharString> buf;
+    std::vector<const char*> ptrs;
+
+    GdsArray(Array& arr) : buf(arr.size()), ptrs(arr.size())
     {
         for (int i = 0; i < arr.size(); ++i)
         {
-            arr[i] = buf[i].get_data();
+            buf[i] = String(arr[i]).utf8();
+            ptrs[i] = buf[i].get_data();
         }
     }