diff --git a/firmware/Makefile b/firmware/Makefile
index fb82ebd..e47cfcd 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -1,6 +1,6 @@
 PROJECT=pentabug
 
-APPS = buggy mariotheme geiger ducklings wuerfel blinker
+APPS = buggy jumpy mariotheme geiger ducklings wuerfel blinker
 
 OPTIMIZATION = -Os
 MCU = atmega88pa
diff --git a/firmware/apps/jumpy.c b/firmware/apps/jumpy.c
new file mode 100644
index 0000000..2b14084
--- /dev/null
+++ b/firmware/apps/jumpy.c
@@ -0,0 +1,61 @@
+#include <pentabug/app.h>
+#include <pentabug/hal.h>
+#include <pentabug/pentatonic.h>
+#include <pentabug/listen.h>
+#include <pentabug/helper.h>
+#include <pentabug/music.h>
+
+#define SENSITIVITY_FACT		4
+
+static uint16_t max_sound;
+static uint8_t first;
+
+static void init(void) {
+	pentatonic_direction(ALL_OUT);
+	listen_init();
+
+	max_sound = 5;
+	first = 0;
+}
+
+static void run(void) {
+	uint16_t sound = listen_measure();
+
+	pentatonic_all_led_set(max_sound >> 5);
+
+	if(!first && sound > max_sound / SENSITIVITY_FACT) {
+		int8_t intensity = SENSITIVITY_FACT + 1 - max_sound / sound;
+
+		intensity = MIN(intensity, SENSITIVITY_FACT + 1);
+
+		motor_on();
+
+		set_note(NOTE_C, (rand() & 3) + 3);
+
+		for(size_t i = 0; i < intensity; ++i) {
+			led_set(RIGHT, rand() & 1);
+			led_set(LEFT, rand() & 1);
+
+			wait_ms(100);
+		}
+
+		// turn everything off
+
+		stop_note();
+
+		motor_off();
+
+		led_off(RIGHT);
+		led_off(LEFT);
+
+		wait_ms(100);
+	} else {
+		first = 0;
+	}
+
+	if(sound > max_sound) {
+		max_sound = sound;
+	}
+}
+
+REGISTER(run, init, NULL);
diff --git a/firmware/include/pentabug/listen.h b/firmware/include/pentabug/listen.h
new file mode 100644
index 0000000..f75b572
--- /dev/null
+++ b/firmware/include/pentabug/listen.h
@@ -0,0 +1,12 @@
+#ifndef LISTEN_H
+#define LISTEN_H 
+
+#include <stdint.h>
+
+void listen_init(void);
+
+void listen_stop(void);
+
+uint16_t listen_measure(void);
+
+#endif /* LISTEN_H */
diff --git a/firmware/lib/listen.c b/firmware/lib/listen.c
new file mode 100644
index 0000000..8fb3254
--- /dev/null
+++ b/firmware/lib/listen.c
@@ -0,0 +1,66 @@
+#include <pentabug/listen.h>
+
+#include <avr/io.h>
+
+#include <pentabug/hal.h>
+#include <pentabug/lifecycle.h>
+
+void listen_init(void) {
+	ADCSRA |= (1 << ADEN);
+}
+
+void listen_stop(void) {
+	ADCSRA &= ~(1 << ADEN);
+}
+
+uint16_t listen_measure(void) {
+	// save previous state
+
+	uint8_t prev_state = PINC & (1 << 0);
+
+	// set to ground for discharge
+
+	DDRC |= 1 << 0;
+	PORTC &= ~(1 << 0);
+
+	// wait for discharge
+
+	wait_ms(1);
+
+	// set direction to input for measurement
+
+	DDRC &= ~(1 << 0);
+
+	// collect some sound waves
+
+	wait_ms(1);
+
+	// start measurement
+
+	// TODO: why can't i move this to the initialization?
+	ADMUX  = (1 << REFS0) | (1 << ADLAR);
+	ADCSRA |= (1 << ADPS2) | (1 << ADPS1);
+
+	ADMUX = (ADMUX & ~(0x1F)) | 0;
+
+	ADCSRA |= (1 << ADSC);
+
+	// wait for measurement to finish
+
+	while (ADCSRA & (1 << ADSC)) test_stop_app();
+
+	uint16_t res = ADCL;
+	res |= ADCH << 8;
+
+	// restore state
+
+	if(prev_state) {
+		PORTC |= 1 << 0;
+	}
+
+	DDRC |= 1 << 0;
+
+	// done
+
+	return res;
+}