diff --git a/games/boybomb.p8 b/games/boybomb.p8
index e475aeb..5bd16b9 100644
--- a/games/boybomb.p8
+++ b/games/boybomb.p8
@@ -286,17 +286,26 @@ function process_block(x, y)
         add_explosion(x, y, {4, 15}) -- wood
         puzzle_grid[y][x] = GRID_EXPLODE
     elseif block == GRID_EXPLODE then
+        local ys = {0}
+        local xs = {0}
         if y > 1 then
-            explosion_adjacent(x, y-1)
+            add(ys, -1)
         end
         if y < GRID_H then
-            explosion_adjacent(x, y+1)
+            add(ys, 1)
         end
         if x > 1 then
-            explosion_adjacent(x-1, y)
+            add(xs, -1)
         end
         if x < GRID_W then
-            explosion_adjacent(x+1, y)
+            add(xs, 1)
+        end
+        for xx in all(xs) do
+            for yy in all(ys) do
+                if xx~=0 or yy~=0 then
+                    explosion_adjacent(x+xx, y+yy)
+                end
+            end
         end
         puzzle_grid[y][x] = 0
     end