Square wave generator won't work
Your positive feedback attempts to move the non-inverting input above and below ground. This would work with a dual supply system - ie negative rail below ground.

In a single supply system you need to provide hysteresis above and below some intermediate voltage - this may be Vcc/2 or some other value to allow for eg the fact that input common mode range is typically ground to Vcc-1.5V. 

As Jasen notes - the resistor values are on the small side.
The LM2904 will source and sink 10+ mA but it is best to limit I/O current to usefully less than I_out_max.  

In this case try eg at the non-inverting input   


Remove R2   
Add 15k to V+
Add 10k to ground. 
Change R1 to 10K.
Increase R3 and decrease C1 - or reduce the hysteresis range (smaller R1) to increase frequency.


That should provide an OK starting point for playing.

LM2904 data sheet