diff --git a/hhkb/keymap.c b/hhkb/keymap.c
index fb42a0a16..681658db0 100644
--- a/hhkb/keymap.c
+++ b/hhkb/keymap.c
@@ -151,11 +151,19 @@ static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
      *      |Gui |Alt  |xxxxxxxxxxxxxxxxxxxxxxx|Alt  |Gui|
      *      `--------------------------------------------'
      */
+/*
     KEYMAP(KB_MINS,KB_0,   KB_9,   KB_8,   KB_7,   KB_6,   KB_5,   KB_4,   KB_3,   KB_2,   KB_1,   KB_NO,  KB_NO,  KB_NO,  KB_ESC, \
            KB_BSPC,KB_P,   KB_O,   KB_I,   KB_U,   KB_Y,   KB_T,   KB_R,   KB_E,   KB_W,   KB_Q,   KB_NO,  KB_NO,  KB_TAB, \
            KB_LCTL,KB_SCLN,KB_L,   KB_K,   KB_J,   KB_H,   KB_G,   KB_F,   KB_D,   KB_S,   KB_A,   KB_RCTL,KB_RCTL, \
            KB_LSFT,KB_SLSH,KB_DOT, KB_COMM,KB_M,   KB_N,   KB_B,   KB_V,   KB_C,   KB_X,   KB_Z,   KB_RSFT,KB_NO, \
            KB_LGUI,KB_LALT,KB_FN4, KB_RALT,KB_RGUI)
+*/
+    /* Mouse mode (Space) */
+    KEYMAP(KB_ESC, KB_F1,  KB_F2,  KB_F3,  KB_F4,  KB_F5,  KB_F6,  KB_F7,  KB_F8,  KB_F9,  KB_F10, KB_F11, KB_F12, KB_INS, KB_DEL, \
+           KB_TAB, KB_WH_L,KB_WH_U,KB_MS_U,KB_WH_D,KB_WH_R,KB_WH_L,KB_WH_D,KB_WH_U,KB_WH_R,KB_NO,  KB_NO,  KB_NO,  KB_BSPC, \
+           KB_LCTL,KB_NO,  KB_MS_L,KB_MS_D,KB_MS_R,KB_NO,  KB_MS_L,KB_MS_D,KB_MS_U,KB_MS_R,KB_FN3, KB_NO,  KB_ENT, \
+           KB_LSFT,KB_BTN4,KB_BTN5,KB_BTN1,KB_BTN2,KB_BTN3,KB_BTN2,KB_BTN1,KB_BTN4,KB_BTN5,KB_NO,  KB_RSFT,KB_NO, \
+           KB_LGUI,KB_LALT,KB_FN4, KB_RALT,KB_RGUI),
 };
 
 
diff --git a/layer.c b/layer.c
old mode 100644
new mode 100755
index 700752c98..12fd857cf
--- a/layer.c
+++ b/layer.c
@@ -52,7 +52,7 @@
  */
 
 // LAYER_ENTER_DELAY: prevent from moving new layer
-#define LAYER_ENTER_DELAY 5
+#define LAYER_ENTER_DELAY 10
 
 // LAYER_SEND_FN_TERM: send keycode if release key in this term
 #define LAYER_SEND_FN_TERM 40
diff --git a/vusb/host.c b/vusb/host.c
index 0a507d482..590d2363b 100644
--- a/vusb/host.c
+++ b/vusb/host.c
@@ -115,7 +115,7 @@ static uint8_t kbuf_tail = 0;
 
 void host_vusb_keyboard_send(void)
 {
-    while (usbInterruptIsReady() && kbuf_head != kbuf_tail) {
+    if (usbInterruptIsReady() && kbuf_head != kbuf_tail) {
         usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
         kbuf_tail = (kbuf_tail + 1) % KBUF_SIZE;
     }