diff --git a/src/main.c b/src/main.c
index d8dd15d..fe5ca20 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,5 @@
 #include "img.h"
 #include "mem_arena.h"
-#include "mem_utils.h"
 #include "misc_utils.h"
 #include "obj.h"
 #include "render.h"
@@ -10,7 +9,7 @@
 #include <string.h>
 #include <time.h>
 
-#define SIZE 1200
+#define IMAGE_DIMENSION 1200
 #define RESOURCE(NAME) "resources/" NAME
 
 enum {
@@ -22,14 +21,14 @@ enum {
 
 int main(void) {
   Arena *arena = NULL;
-  if (!wapp_mem_arena_init(&arena, GB(10), WAPP_MEM_ALLOC_RESERVE, false)) {
+  if (!wapp_mem_arena_init_default(&arena, GB(10))) {
     return TINY_EXIT_ARENA_INIT_FAILED;
   }
 
   Colour bg = {.r = 42, .g = 45, .b = 52, .a = 255};
   Colour teal = {.r = 14, .g = 156, .b = 208, .a = 255};
   Render render;
-  if (!init_render(arena, &render, SIZE, SIZE)) {
+  if (!init_render(arena, &render, IMAGE_DIMENSION, IMAGE_DIMENSION)) {
     return TINY_EXIT_RENDER_INIT_FAILED;
   }